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1.
You spelt it wrong DUMBASS!!!
It is not "dumbas" it's 'dumbass' silly!
by Not your problem November 25, 2006
 
2.
Noun: Someone with such extremely low intelligence that they are no longer dumb, they are dumba. The plural dumba dumba. Derived from dumb.
For directions it's Tom Tom, not Dumba Dumba.
by A_shley July 10, 2006
 
3.
A friendly term for Dumb-Ass
pronounced dumb+us
Adrian never understands our comments, he's a bit of a dumbas at times.
by missma May 06, 2010