Big Fat Liar

Big Fat Liar is a 2002 kid's film starring Frankie Muniz as a 14-year-old Jason Shepherd and Amanda Bynes as 14-year-old Kaylee. Very over-the-top, although what can you expect from writer Dan Schneider.

In a modern-day retelling of the Boy Who Cried Wolf, Jason Shepherd is a Big Fat Liar who lies all the time to everyone. Then a greedy movie director- Marty Wolf- steals his creative writing essay to use it as the basis for his next blockbuster, and no-one will believe Jason when he explains what happened. Thus, Jason decides that the only way to convince everyone that he's being honest is to sneak off to L.A. with his friend Kaylee and inflict a series of increasingly harmful pranks on Wolff until he has a nervous breakdown and confesses. Hilarity Ensues.

It got 44% rotten on Rotten Tomatoes, but surprisingly received 3 stars from Roger Ebert.

Tropes used in Big Fat Liar include:

Asshole Victim: Wolf is such a huge jerk throughout the film that the studio's entire staff hates him. Naturally, everyone points and laughs and helps Jason expose him and get him fired.
Bare Your Midriff: Kaylee wears a belly shirt for part of the movie.
Big OMG: Marty gets one when he's in the shower and finally realizes that he's covered in blue thanks to the blue dye put in his pool, and has just put orange coloring in his hair to top it all off.
Break the Haughty
Brilliant but Lazy: Jason.
The Cameo: Director Shawn Levy, Bynes' All That colleague Kenan Thompson, and Dustin Diamond all appear at Wolf's house party.
Cassandra Truth: Main plot of the movie.
Character as Himself: Jaleel White as... Jaleel White
Chekhov's Skill: All of Marty's former employees utilize one in the payback.
Circling Monologue: Between Jason and Marty.
Cool Old Guy: Vince.
Crying Wolf: Doing this all the time is what keeps everyone from believing that Jason lost his homework on his way to school.
Deadpan Snarker: Marty Wolf, when he's not SCREAMING IN EVERYONE'S FACES.
Disturbed Doves: See Ironic Echo below.
DIY Disaster: Jason and Kaylee purposely wire Marty's car to do this, with the brake making the car horn go off, and a lot of other stuff.
Drives Like Crazy: Jaleel.
Dumb Muscle: Bret Callaway.
Earn Your Happy Ending
Engineered Public Confession The ending.
Fat Bastard: How Marty treats his own public relations manager.
Formally-Named Pet: Marty Wolf has a stuffed monkey named Mr. Funnybones that he's... oddly attached to.
Former Child Star: Poor ~~Steve Urkel~~ Jaleel White just can't be taken seriously.
Girl Friday: Without Kaylee, Jason is dead in the water. Seriously, he can't pull off anything without her.
Grandparental Obliviousness: Grandma Pearl. "That woman doesn't even know what year it is".
Groin Attack: Heavily implied to be what Marty (dressed as "Wolfy the Clown") got in the ending.
Heel Face Turn: Monty has one, along with all of Marty Wolf's employees
High School Hustler: Jason at school.
Hoist by His Own Petard: Marty's over-arrogance is what pretty much does him in.
Hollywood California: The setting of most of the movie.
Hollywood Skydiving
Humiliation Conga: What Marty goes through throughout the movie when Jason goes after him.
Hypercompetent Sidekick: Monty has been writing Wolf's scripts for him for years. Overlaps with Beleaguered Assistant, as she gets nothing but grief for her trouble.
I Am Not Spock: Poor Jaleel White...

"How many times have I told you not to call me "Urkel?!" My name is Jaleel White!"

In a World: Parodied in the BFL Trailer.
Ironic Echo: "12 camera angles with birds flying around..."
Jerkass: Marty Wolf should be a 7-letter word.
Jerk Jock: Bret Calloway.
Kitsch Collection: The secretary's tacky stuffed dog collection.
Large Ham: Paul Giamatti really enjoyed himself making this movie.
Late for School: The opening.
Locking MacGyver in the Store Cupboard: Once he captures Jason and Kaylee, Wolf sends them back to the prop warehouse to pack for their flight home. The same warehouse where they previously got every tool they'd used against him so far....
Massive Multiplayer Scam: emphasis on Massive.
Mean Boss: Marty Wolf.
Meaningful Name: Perpetual liar Jason Shepherd has his English paper stolen by Marty and, of course, Jason isn't believed when he explains this. Note: Their last names refer to Aesop's fable the Boy Who Cried Wolf.
Metaphorgotten:

Kaylee: I wanna see a broken man, people. I mean, broken as in, "I hit a baseball through the window" broken. I want you to turn him into mince meat, and I don't even know what mince meat is! I want him to cry for his mommy! "Wah! Wah! Mommy, mommy, mommy!" Do you read me?! 'Cause I don't think you read me!

Mexican Standoff
The Nicknamer: Marty Wolf, and a mean one at that.
"No Respect" Guy: Anyone who works for Marty. Just pick 1 person.
- Rocko Malone, the security guy?
Obsolete Mentor: Poor "Gramps".
The Oner: Jaleel White's intro scene. The deleted scenes reel has an even longer version.
Paper-Thin Disguise: Bret as Kaylee, although justified, considering Grandma Pearl is half-blind.
Platonic Life Partners: Jason and Kaylee
Refuge in Audacity: Like any director would steal creative writing from some kid's backpack and turn it into his next big movie...
Sarcastic Confession
Slow Motion Drop: Parodied in the movie trailer of the movie-in-a-movie Big Fat Liar
Stealth Pun: Jason always lies until he finally tells the truth that someone stole his paper, and no one believes him. The thief? Director Marty Wolf. Jason is the Boy Who Cried Wolf, literally.
Stern Teacher: Mrs. Phyllis Caldwell, Jason's English teacher.
Surrogate Soliloquy: Marty with Mr. Funnybones
Throw It In: Most of Kaylee's gags were ad-libbed.
Two Words: Obvious Trope: Parodied in the awful movie-in-a-movie Whittaker and Fowl:

Listen Whitaker, I am not your father and I'm not your priest I got two words for you: shut the heck up! You talk way too much... can we cut?

Unsportsmanlike Gloating: Oh boy.

Marty: Yeah, I stole your story, whoop-de-doodle-do! I STOLE JASON SHEPARD'S STORY AND TURNED IT INTO BIG FAT LIAR! Do you know who's listening? Nobody and get used to it. Because I will never-ever-never-ever-ever-ever-ever-infinity tell the truth!

Wounded Gazelle Gambit: Pretending the dog-lover secretary's car is parked on a dog's tail
You! Get Me Coffee!: Marty's attitude to Monty
You Have to Believe Me: Poor Jason
Zany Scheme: Jason comes up with these, A Simple Plan, and then the most elaborate plan of all