1 definition by FlockaFlocka12

Top Definition
the traffic caused by a group of African Americans blocking the hall and preventing Caucasian students from moving to their next class.
Tom: Dude, why arent we moving?????
Andrew: Man this is the Math hall. This is probably the black-up from all those black guys who walk slowly.
by FlockaFlocka12 February 02, 2011

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