don't stunt

another way of saying don't flex

or don't sneak diss

person one - have you ever been cheated on?
person two - yes
person three - don't stunt on John

john is the person who cheated on them

Don't pack a jacket

A polite and sneaky way to say "go to Hell."

Upon hearing of OJ's passing, I had thought: "Say hi to Johnnie Cochran, and don't pack a jacket."