Hearing or seeing the phrase “That’s what’s up” make me want to shoot someone.

It doesn’t really MEAN anything!

A:”Where are you from?”

B: “Wisconsin”

A: “That’s what’s up.”

A: “I just found a dollar!”

B: “That’s what’s up.”

A: “I have a chancre sore that may be herpes.”

B: “That’s what’s up.”

I DOESN’T MEAN ANYTHING, YOU MIGHT AS WELL BE GRUNTING AT ME.