Haven't You Seen X Before?

What's the matter? Haven't you ever seen this trope before?

When you hear this familiar Stock Phrase, the chances are that one of the following is the case:

"Freddie: What you looking at? You never seen a guy who slept with a fish before?"
 * A character has been caught in some sort of embarrassing act, and, for want of a better tactic, is attempting to shrug off the embarrassment and avert the stares of onlookers by pretending that there is in fact Nothing To See Here. Sometimes a character is doing this on another character's behalf. Example from the film Splash:

"Sub Captain: What's the matter, sailor? You never seen a major taking a shower before? (The major is an attractive woman.)"
 * As above, something unusual is going on, but this time the character is using the line ironically, or at least knowingly. In such cases the character is evidently aware that the sight before him is well out of the ordinary, but, instead of gawping with his cohorts, greets it like The Stoic and/or Deadpan Snarker he is. Example from The Spy Who Loved Me:

"Philip Marlowe: What's the matter? Haven't you ever seen a gun before? What do you want me to do, count three like they do in the movies?"
 * A Deadpan Snarker is mocking another character's shocked reaction to something by which the former is unfazed. Example from the film The Big Sleep:

"Butch: What's she looking at? She acts like she's never seen a man before. Queen Lara: She hasn't. Have you, Alpha-Beta? Alpha Beta: No, My Queen."
 * The line is being used similarly to You Look Like You've Seen a Ghost, with no, he hasn't being implied instead of yes, he has. Example from Amazon Women on the Moon:

Anime
"Tsubasa: What's the matter? Never seen a real guy before?"
 * Ranma 1/2:

Film
"Dr. Benjamin Franklin: What's the matter? Haven't you ever seen a great man before?"
 * 1776

"Frylock: Haven't you ever seen a bra before?"
 * Aqua Teen Hunger Force Colon Movie Film for Theaters

"Oki: What are you all looking at? Haven't you ever seen anyone kick a dog before?"
 * Atanarjuat

"Patsy Cline: You act like you ain't never seen a glamorous country music singer before."
 * Coal Miner's Daughter

"Darian Forrester: What's the matter, haven't you ever seen a Valiant before?"
 * The Crush

"Emmanuelle: What's the matter? Why are you so shy? Have you never seen a naked woman before?"
 * Emmanuelle V

"Phil: What's the matter? You never seen a satyr before?"
 * Hercules

"Tony Stark: Let's face it, this is not the worst thing you've caught me doing."
 * Iron Man (variant)

"Sean: [running from a dinosaur] Haven't you ever seen a dinosaur before? Trevor: Not with skin on it!"
 * Journey to the Center of the Earth (2008)

"Sing: [to ice cream vendor looking at him strangely] What're you looking at? Never seen an ice cream thief before?"
 * Kung Fu Hustle (2004)

"Flynn Carsen: What's the matter? Haven't you guys ever seen a naked guy in a sheet before?"
 * The Librarian: Quest for the Spear

"Felix: Golly. What's the matter with them? Haven't they ever seen a tourist before?"
 * Mad Monster Party?

"Rusty Dennis: What's the matter, never seen anyone from the planet Vulcan before?"
 * Mask (1985)

"Sergeant-Major: Don't stand there gawping! Like you've never seen the hand o' God before!"
 * Monty Python's The Meaning of Life:

"Mushu: [disguised as a messenger riding the panda] Urgent news from the General. [beat] What's the matter? Never seen a black-and-white before?"
 * Mulan

"The Artful Dodger: [to Oliver, who has just arrived in London] Whatchu starin' at? 'Aven't you never seen a toff?"
 * Oliver! (1968)

"Mauser: "What's the matter? Haven't you ever seen a man washing his hair before?""
 * In Police Academy 2, after Mahoney replaces Lt. Mauser's hair conditioner with quick-acting epoxy resin while the latter takes a shower, Mauser's hands get glued to his head. Unfortunately for him, the shampoo runs into his eyes, so he's quite blind as he staggers out and rants at his men about how immature and un-funny this is. By the time he can see again, though, he's wandered out of the locker room altogether and is in the police station itself, in his birthday suit, hands stuck to his shampooed head, leading him to inquire of the stunned civilians and fellow cops:

"Mr. Marks: WHAT? You've never seen someone humiliated before?"
 * The Producers (2005)

"Helen Harris: It's like they've never seen a dress before!"
 * Raising Helen

"Sunshine: [coming into the game to replace Rev because Rev's wrist was broken during the previous play] What's the matter? Haven't you ever seen a football injury before, you wimps?"
 * Remember the Titans

"Sam the Snowman: What's the matter? Haven't you ever seen a talking snowman before?"
 * Rudolph, the Red-Nosed Reindeer (1964)

"Heihachi Hayashida: Haven't you ever seen anyone cut firewood before?"
 * Seven Samurai

"Ally: What are you staring at? Haven't you ever seen a pair of boobs before?"
 * Sleepaway Camp II Unhappy Campers

"Martha Jane Canary: What are you gawking at? Ain't you never seen a pair of pants before?"
 * Young Guns of Texas

""Everyone else around here acts like they've never seen a black man before; why should he be any different?""
 * Shoot To Kill (AKA Deadly Pursuit) after Sidney Poiter scares off a bear.

Live Action TV
"Barney Fife: What's the matter, haven't you ever seen a man take off a dress before?"
 * The Andy Griffith Show

"Ray Vecchio: [while dressed as Fraser, to a passing pedestrian] What are you looking at? You never seen a Canadian before?"
 * Due South (episode "An Invitation to Romance")

"Billy: Exactly. Anybody would think we'd never seen a bloke in a dressing gown up to his waist in water strangling a swan before."
 * Last of the Summer Wine (episode "The Swan Man of Ilkley")

"Sisko (disguised as a Klingon): What's the matter, Dukat? Haven't you ever seen a Klingon before?"
 * Star Trek: Deep Space Nine (episode "Apocalypse Rising")

"Brenna O'Dell: And what are you staring at? You never seen a woman before?"
 * Star Trek: The Next Generation (episode "Up the Long Ladder")

"Private Alberto Ruiz: What's the matter? Ain't none of you niggers ever seen a spic before?"
 * Tour of Duty

"Karen: [to woman] What are you looking at, preggo? Haven't you ever seen herpes before?"
 * Will and Grace

"Josh Exley: What's the matter, Arthur? You look like you ain't never seen a black man before."
 * The X-Files (episode "The Unnatural", after a Glamour Failure reveals his alien self)

"Maddy: Yes, all right. Haven't you ever seen a transvestite before?"
 * Jonathan Creek (episode "Time Waits for Norman")

"Barney: It's called a beard! Haven't you ever seen a beard before? Yamana: Not in my family."
 * Barney Miller (when Nick Yamana was convinced that a suspect was turning into a werewolf)

"Lou: What's the matter, Kid? Ain't you ever seen a girl before?"
 * The Young Riders (when Kid has to remove Lou's pants to tend to a bullet wound in her leg)

"Winchester: Haven't you ever seen truffles before? B.J.:Nobody knows the truffles I've seen."
 * MASH (when Winchester receives a package of truffles as part of a Care package from his family):

"Vanco: What's the matter, Schraeder? You act like you've never seen a severed human head on a tortoise before!"
 * Breaking Bad


 * Queer as Folk when Police Chief Stockwell and Brian's boss shows up at Brian's and find Brian and Justin (who also happens to be an intern at Brian's company at the time) having sex, Brian sarcastically asks if they've never seen two guys fucking before. It just so happens that the thing they're most upset about isn't the fucking, but that the floor is littered with half-finished anti-Stockwell propaganda posters of the kind that have been showing up all over the city without anyone having a clue as to who made them.

Music

 * "Y'all act like you've never seen a white person before", the opening line to Eminem's "The Real Slim Shady", as a response to all the hoopla over the fact that he was a white guy who made it famous as a rapper.

Theatre
"Celebrant: What are you staring at? Haven't you ever seen an accident before?"
 * Leonard Bernstein's Mass, "Fracture":


 * In context, the celebrant has just thrown down and shattered the consecrated elements, so the moment is shocking.

Video Games
"Spyro the Dragon: Hey stop staring! Haven't you ever seen a dragon before?"
 * Spyro 2: Ripto's Rage!

"Tatl: What? You don't know about the [target creature]?"
 * The Legend of Zelda: Majora's Mask


 * Rather tellingly, only for enemies that also appeared in Ocarina of Time.

Web Comics
""What? Never seen a black woman before?""
 * DMFA 820. Since the dimension usually doesn't have humans...

Web Original
"Dacey 'Dawson' Ashcroft[after being revealed as a female to male crossdresser]: "You mean you've never seen a guy with boobs before?""
 * Survival of the Fittest

Western Animation
"Tails: What's everybody afraid of? Sonic: Yeah! You'd think they never saw a blue hedgehog before."
 * Adventures of Sonic the Hedgehog

"Bugs Bunny (after mutating into a green rabbit-like beast): What's eating them? You'd think they'd never seen a rabbit before!"
 * The Looney Tunes cartoon "Hyde and Hare"

"Cubert Farnsworth: What? Haven't any of you seen a genius' wiener before? Everyone: No. Fry: Well, once in the park."
 * Futurama:

"Bowser: Hey, what're you staring at? Haven't you ever seen a reptile ready to conquer the world?!"
 * The Adventures of Super Mario Bros. 3:

"Brock: You could have told me Sasquatch was a... a dude. Steve Summers: Huh? You couldn't tell? Brock: Not until I had to... sh-have him. Steve Austin: What're you, shy? Sasquatch doesn't have anything you haven't seen before. Brock: Sasquatch is something I haven't seen before!"
 * Variant in The Venture Brothers, after shaving the Sasquatch:


 * "Hey Homer, what's the matter?" "Ain't you ever seen a naked chick ridin' a clam before?"

Other
"G2-4T: Hey! What's the matter? Haven't you people ever seen intelligent life before?"
 * Star Tours Disneyland ride