This is how idiots spell dumbass.
It's dumbass, not dumass, dumbass.
by Balls 2 Heavy July 22, 2006
1.One who's level of intelligence is comparable to that of their own ass.

2.One who's actions suggest that they might be thinking with their own ass, though it, like their brain, lacks the ability to make intelligent decisions.

See also dumnass
dum ass
dumn ass

(Don't spend too much time on these alternatives, sperm-for-brains. They all mean the same thing.
Jesus. Dumass.
Maybe if you weren't such a dumass, people wouldn't kick you.
by kyleisnotajew July 29, 2005
stupid person.
also Alexander Dumas from the Shawshank Redemption. When the redneck mispronounces the authorof the Man in the Iron Mask and Tim Robbins'character sets him straight.
Shut up Monsieur Dum-ass!
by doggbutt September 24, 2003
-Bay Area way to describe as an adjective something extreme.
My Jordans is dumass clean.
by Leemo79 September 28, 2006