A white person or any person that is not black who can jump, run, talk , pimp hoes, deal drugs, smoke rocks, and pop caps like a black person. Often reffered to as "crazy white boy". Comes from ebonics.
Muhammed: Man that white boy Jim crossed me up and broke my ankles while weez wuz playin ball, he be a Quantum Negro.
by Garrett Ward January 07, 2005