An amateur insult comeback. It is often regarded as one of the worst possible insult comebacks, being criticized for its lack of creativity, low versatility, and manipulation of English grammar in the word "you."

The comeback was popularized by a scene from the 1985 film 'Pee-Wee's Big Adventure,' in which Pee-Wee Herman repeatedly says the comeback after being told a string of insults by someone else.
Mark: You should have let me copy your test answers in class today.
Jim: No, it's against the rules. Stop relying on me to bail you out all the time. You're such a blowhard sometimes...
Mark: Oh, yeah? Well, you're a coffee whore whose father is on crack!
Jim: I know you are, but what am I?
Mark: You're a loser who doesn't let me copy your test answers in class!
Jim: I know you are, but what am I?
Mark: -_- seriously dude
by A Person Named August 11, 2013
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An area in which is no longer inhabited because some fucked up shit happened.
1. I played CoD4... I know what Chernobyl looks like! That's some Will Smith "I Am Legend" type shit
by Gprime8989 August 10, 2009
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A look given to students by Mrs.Perkins who misbehave or don't complete there homework. This 'look' is highly feared, and emotionaly scarring.
Student:"Oh my god! Whats wrong?"
Crying Student: "I forgot to do my homework last night and got the 'I AM GONNA RIP YOUR FACE OF!' look!"
Student:(dies loudly)
by RoboChick May 04, 2009
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I know you are but what am I

Basically you can't come back from it unless you use an Uno reverse card. An op roast for kids 7-10
Gay1:your mum gay lol
Gay2:no u

Gay1:uno reverse card

Gay2:I know you are but what am I

Gay1:fuck
by Oh crackers April 26, 2019
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When Foxy runs he says this.
(Foxy runs down the hall) swiggity swoogity i am coming for that booty!
by ZzWatermelonJuicezZOnYt June 06, 2019
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When someone believes that sharing certain information could lead to negative consequences for themselves.
- In terms of how this game panned out in the end, just how big an impact did those two sendings-off have?
- I prefer really not to... not to speak. If I speak I am in big trouble. In big trouble. And I don't want to be in big trouble.
by VΑSI June 14, 2023
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