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I know you are, you said you are, so what am I?

Blatantly useless retort which younger primary school students use.
Playground Bully: Ha ha! Ernie's Crap!
Ernie: I know you are, you said you are, so what am I?
Playground Bully: I just said that you were crap, though!
Ernie: I know you are, you said you are, so what am I?
by Ophite1 June 7, 2004
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I Know This Guy

An "I know this guy" story is a bullshit story where one person thinks up something funny, cool, gross, weird, or sexy, but essentially untrue, and tries to pass it off as true by framing it as if it happened to someone they supposedly know. It's similar to the "I have this friend" story, where someone asks for advice about a problem that's really about them but they're too embarrassed to say so. "I know this guy" stories are purely about entertainment, however, not about seeking advice.
Jerry: "I know this guy... he caught his sister having sex with their cousin and two friends in their uncle's bed."
Joe: "Sure, Jerry. You *know* this guy. Riiight."
Jerry: "I swear! It's true!"
Joe: "Bullshit. What was the guy's name then?"
Jerry: "Well I don't *know* him, but I heard about it."
Joe: "Sure you did. Sick pervert."
by kevnar February 19, 2007
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I know you are, but what am I?

A retort with profound implications. Pee Wee's greatest contribution to youth culture.
Person A: You smell bad.

Person B: There's this thing about a small squirrel and how nobody loves you. Hi-ya! Now that's what I call a verbal bitch-slap.

Person A: I know you are, but what am I?

Person B: Haha what a complete fail of a a comeback. It's like, your face is all red, and you can't come up with a comeback.

Person A: It made no sense, but therein lies the point. The notion that one needs to respond with a rehearsed "comeback" is inane. Your squirrel-centric comeback was also inane; it failed to address your abhorrent smell, it seemed to mistake randomness for wit (really a squirrel?), and the mere fact that you would use it as an example of a verbal bitch-slap is laughable, as it lacks slap. It is quite slap-less. I respond to inanity with inanity.

Person B: Well, "your" still a faggot. And now I'm going to win this by blowing your mind with an ounce of inverse-Descartian drivel.

Person A: Nooooooooooooooo
by wrongontheinternet October 21, 2010
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i know who killed me

Best movie of 2007. Bad enough to be called genius. The plot is so contrived, the acting so poor, the script so inane, that it holds the prestigious honor of being the best movie of the year. And to top it all off, Lindsay Lohan is the star.
"I saw "I Know Who Killed Me" stoned out of my mind and it was incredible. Say what you want about Lindsay Lohan, but that bitch is fucking hot."
by Trossles January 9, 2008
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I know you are, but what am I?

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 September 7, 2013
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I Know About the Cadillac

Any time product placement, especially on a cable television program, becomes egregious and breaks the credibility of the program.

Named for Damages' second season, when a tie-in with Cadillac overwhelmingly overpowered the credibility and quality of the show.
Why did Buzz's car have to be a Prius on The Closer? God, I know about the Cadillac.
by WrittenWords September 10, 2009
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i know your mother

something old people say when ur hit or brak their car
old man: i know your mother
boy: whats her name?
old man: never you mind
lol old man=epic fail
by martinboi09lawds April 29, 2011
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