a whack mc is usually any rapper on Mtv... these people rap to make money and talk about nothing exept thier money and hot ass girls in the videos, thease people are NOT to be confused with hip-hop artists. real hip-hop M.C.'s rap about life, and all aspects of it.

when you're hungover as shit after a spending a night drunk as a skunk

One who peddles whack rhymes around your hood. see also jibberish

In the Hip Hop scene a Whack MC is a disrespected MC.