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?

I know you are, you said you are, so what am I? by Ophite1 June 7, 2004

you know I love ya 

a good opportunity to say this phrase would be after cracking a joke about someone that is somewhat insulting, but not taken to the heart.

"aww come on now, you know i love ya!"

you know I love ya by Melanie May 21, 2004

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

I know you are, but what am I? by wrongontheinternet October 21, 2010

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

I know you are, but what am I? by A Person Named September 7, 2013

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

I know you are but what am I by Oh crackers April 26, 2019

you know I love ya 

used after insulting or making a joke of someone, to make them feel better

Dude that was cold!
Oh, you know I love ya.

you know I love ya by commoner May 22, 2004

Noah I know You Looked This Up 

WHY DID YOU LOOK THIS UP

Noah I know You Looked This Up.

Noah I know You Looked This Up by UD BNA FAN May 17, 2021