A simple phrase, but usually uttered by trash human beings. Usually it is a sarcastic response after someone says "Can I ....... (Enter More Sentence Here)?" If someone says this near you, you may want to exclude them from your friend list.
Person 1: "Can I get a drink of water?"
Person 2: "I don't know, CAN YOU?"
by Mr. EEEEEEE October 28, 2019
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This is a catch phrase that originated in a TV ad in the late Eighties that featured super athlete extraordinaire Bo Jackson and rock'n'roll pioneer Bo Diddley (he's notorious for his famous box-shaped electric guitar). Basically, the term means that somebody doesn't know doodly squat.
The narrator says:
Bo knows football.
Bo knows baseball.
Bo knows weightlifting.
***********************
In the meantime, Bo Diddley cranks out the notes on his guitar.
Then he says:
Bo, you don't know diddley!
by I Saw U2 Live Twice September 19, 2007
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Phrase exclaimed by those working in fried chicken restaurants when they don't know what else to say

(Like, "Oh, sorry, my mistake)
**As witnessed at an actual Popeyes by T. Dale Shaw**

Elderly Woman: I called in an order for 300 pieces of chicken.

Popeyes Worker: (audible smack) Is dat fo here o to goes?

EW: Honey, I can't eat 300 pieces of chicken.

PW: Bitch, I don't know your life.
by dilbear February 25, 2005
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When someone either genuinely does not know how to respond to something or is trying to avoid the topic of conversation. Often used to make situations awkward, and can be used to end conversations.
friend: my girlfriend just cheated on me
me: I'm so sorry to hear that
friend: I wish I could get over this in two seconds, ugh I hate life.
me: I don't know how to respond to that
by Born_2_Win_145 May 12, 2019
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A vague and mysterious phrase to suggest people don't know something about your character which you have kept a close secret. Just like hiding something in the closet.
Andrew shouted loudly and repeatedly 'You don't know about me! You don't know about me!'
by Flimsco April 5, 2020
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An expression indicating extreme doubt, often implying that the suggested idea was a terrible or unwise one.
"Dude, would you do acid if I offered you some?"
"I don't know about all that."
by Paul L-K (while blunted) March 23, 2005
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