Superbad/Funny

Fogell unveils his brand-new fake ID to Seth and Evan, on which he claims he's a 25-year-old Hawaiian named... McLovin.

Evan: It's up to you, Fogell. This guy is either gonna think "Here's another kid with a fake ID", or "Here's McLovin, the 25-year-old Hawaiian organ donor". So what's it gonna be?
Fogell: ...I am McLovin.
Seth: No, you're not! No one's McLovin! McLovin's never existed because it's a MADE-UP DUMB FUCKING FAIRY TALE NAME, YOU FUCK!!!!

- Earlier in that scene, when Fogell's explaining why he chose McLovin:

'Fogell: Well, it was either that or Mohammed.
Seth: Why the fuck would it be between that and Mohammed?!
Fogell: Because Mohammed is the most commonly used name on Earth. Read a fucking book.
Evan: Fogell, have you ever actually met someone named Mohammed?

The Crowning Moment of Heartwarming near the end with Seth and Evan in their sleeping bags:

Evan: I love you. I'm not embarrassed, why can't we say it more often?
Seth: *pokes Evan's nose* Boop-boop-boop...

Seth telling Evan about his dick drawing problem he had in the 4th grade.
Seth's fantasization as he goes into the store to buy alcohol.
The girl Seth was dancing with at the wild party where they try to steal beer from had her period on Seth's pants. Later, she got drunk and blames him for it and quickly calls the cops on them as they runaway.
- Foregone Conclusion: The cops will probably come to the house and take everyone in.
Officers Slater and Michaels, upon hearing sirens in the background of a scene:

"OH SHIT! IT'S THE COPS!"

- Also, as they crash the party.

"I'm assuming you all have guns and crack!"

This Gem

Greg: What the fuck Evan we're down two points!
Evan: Fuckin' calm down Greg, it's soccer, it's soccer.

Seth tells Fogell that his picture on the fake ID make him look like a future pedophile.
Seth mocks Evan for trying to bring lube.

Seth: What's Becca gonna say when she sees this? "Oh Evan! Thank God! I never would have been able to handle your fucking 4-inch dick inside my pussy without that giant bottle of LUUUUUBE!"

"Prepare to be fucked by the long dick of the law!"
When Seth is (kind of) running track and field, an amputee laps him.

Amputee: Pussy~!"

"It's no big deal, apparently like ten percent of all kids do it..."
The part where the cops hear sirens and exclaim "Oh shit, its the COPS!" At no point do they stop and think "oh right, we are the cops." No, they just keep running.
- They're morons, and drunk out of their minds. Of course, that just makes it funnier.
When the cops were chasing Seth, Evan and Fogell.

WHY MCLOVIN?! WHYYYY?!

Becca stripteasing was pretty hilarious, as she was drunk and silly. And those weird "doopy doopy doo" noises she was making. Evan was understandably awkward.
"Fuck my life..."
A meta example. In 2019, a 20-year-old University of Iowa student was arrested for using a copy of the "McLovin" ID at a bar.