People who rap about shit that makes no sense. AKA, a doo doo stain rapper. Some examples include (but are not limited to)
•50 Cent
•Game
•Logo
•P Diddy
What the fuck did he say? What whack rappers.
Sometimes used to describe someone that is whack.
Man, fuck Shane, Charles, Fobb Mobb, and the rest of HHN, they're WHACK RAPPERS