Dumb-ass definition, a thoroughly stupid person; blockhead. See more.
Dumb-ass definition: a stupid person | Meaning, pronunciation, translations and examples.
A person who is both dumb and an ass at the same time. Contrast with "dumbass, " which is a conjugate of the terms, thereby creating a new class of person.
boi yuh is de biggest damn ass in yuh family. #stupid#retarded#damnass#fool# idiot. by valleyman between estate and louisville September 13, 2006.