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2.
An illiterate's version of dumb ass.
The dumb ass writes dumass for dumb ass.
by Alexandre Dumas February 13, 2006
 
8.
Slang for Dum Ass
See Fiedler, Fiedlerism, and Fiedlerality
Fiedler: "I'm Dum Ass material, Mr. Dum Ass!"

Boss: " It's Du Mass. What A Dum Ass"
by Tim Snitcherberry December 04, 2004
 
9.
The University of Massachusetts in Dartmouth.
Person 1: I graduated from DUMass.

Person 2: That seems appropriate.
by Abbietimesamillion September 13, 2006
 
10.
short for dumb ass
that chick is a dumass
by hehe June 09, 2003