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1 definition by Lil Lori

 
1.
to act stupid , wild , crazy. Basically going insane usually during dancing (crump dancing) in a positive way !!!
Misha: Go Zane, go Zane! Yo he's is killin' it right now!

Mika: Fa sho, he dummin' it with them moves.
by Lil Lori June 09, 2006