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.
lil'jon is a whack m.c. what a dumb ass? why did you people make him a millionare?
by matt the new felon October 29, 2004
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One who peddles whack rhymes around your hood. see also jibberish
"Chad be a whack M.C.."
by Joey! January 23, 2004
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