Top Definition
When one's pants fall down due to a sudden motion which in turn exposes part of their buttocks and or the crack of their buttocks.
Clara: Alyssa just got up from her seat and totally crack attacked me!

Becca: Oh man, she's always doing that. You have to be careful when you sit behind her.
#crack #butt #mooning #attack #flashing
by Lisser Lou March 12, 2010
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