You know somethin'? You suck!
4 seconds sound clip from the Billy Madison movie soundboard.
You can hear this line at 00:23:23 in the Blu-ray version of the movie.
Quote context
[...]
- I bet that Snack Pack's pretty good. Wanna trade me the rest of it for this banana?
- You know how badly I can beat you, right?
- Mortal Kombat on Sega Genesis is the best video game ever.
- I disagree. It's a very good game, but I think Donkey Kong is the best game ever.
- You know somethin'? You suck!
- Hey! That's very nice of you to pick up your little brother here at school.
- He's not my brother. He's my son.
- Mom, that's Billy. He's in my class. I heard he's retarded or something.
[...]