A
casual, slang expression which can be
used in a variety of situations. It can be used as a response to a person's rude remarks, behavior, ineptitude, or unreasonable demands and favors.
Similarly, It is another way of saying don't worry about it, it's not your
fault, you're fine, no thanks, or that's OK.
When someone accidentally bumps into you at a crowded bar:
Person
1: "Oh my bad
man, I didn't see you there."
Person 2: "Nah you good."
When asked to do a favor:
Mom: "Honey, can you take out the trash? It's overflowing and there are ants everywhere"
Son: "Nah you good."
If someone tries to
cut you in
line at a fast food restaurant, throw out a stiff arm and say "nah you good."