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!
An insult; meant to inform someone that they are horrible at what ever they are trying to do, and should not make a career out of it.
Chick 1: My heart will go oooon and oooon!
Chick 2: Don't quit your day job.
This is term most commonly used as a statement urging someone to get revenge. It is often used when one is feeling especially vengeful for this certain wrong.
Gandalf: Gimli just broke into my house and ate all of my cupcakes, you know, the ones with the little hearts.
Bilbo: Oh?
Gandalf: And he shaved my beard, i'm really mad.
Bilbo: Don't get mad, get even.
A phrase used to ridicule someone's stupidity, "big white mint" refers to a urinal cake. Thus "don't eat the big white mint" implies that someone is stupid enough to mistake the urinal cake for a mint and eat it.
I was on a date with this really dumbass guy, and he said he had to go to the bathroom. I said, OK, don't eat the big white mint.
The intro to almost all the songs produced by music producer Metro Boomin as said by Future.
Future: "If young metro don't trust you, I gon shoot you"
Jimmy: "IF YOUNG METRO DON'T TRUST YOU IMMA SHOOT YOU."
Ron: "No, I don't think he trusts you because you can't even say it right..."
A warning to others stating that if an altercation is to be avoided than they should cease acting in a provacative manor.
I don't give a flying fuck is a combination of words you say when you don't care about something.
Person 1: I just ate some mac n cheese
person 2: I don't give a flying fuck