look up any word, like kappa:
 
2.
to be messed up as hell on weed or alchohal
This gangsta is dummin
by ssanchez January 30, 2007
 
1.
when you looking fly!
Look at my dawg she dummin on them boys!
by Adri'Adri September 06, 2007
 
3.
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