
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.
Mika: Fa sho, he dummin' it with them moves.
by Lil Lori June 11, 2006

by Adri'Adri September 16, 2007

Noun- An insult used by individuals of severely underdeveloped intellect to make oneself feel adequate.
Person 1: What are you, Dummin?
Person 2: What does that even mean?
Person 1: I’m not sure, I couldn’t make it passed the fifth grade.
Person 2: What does that even mean?
Person 1: I’m not sure, I couldn’t make it passed the fifth grade.
by IJ1987 January 25, 2022
