Black rims on a flossin bike. Term made popular by the song of the same name by rap group the Cool Kids.
"dyno wit the black mags, black mags" --The Cool Kids
by d-riv February 09, 2008
when an african american inserts a vibrated into his own anal cavity then walks around the mall and screams "oh yeah!"
Patrick Zacharias always black mags himself even though he is white!
by Nick Zacharais August 15, 2009