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Someone who makes senseless choices and ruins everything.
ex. George Bush
51% is not a mandate, George W Bush is a dumbass.
dumbass by Lisa K May 13, 2005

Stupid dumb dumb stupid dumbass 

Honestly one of the worst comebacks you could ever say to someone.
A: your a nigger zipper head chink looking banana eating tree nigger head ass kike ugly ass.
B: well your a stupid dumb dumb stupid dumbass.
B: faggot
A: fucking vanishes from existence
Dumbass: (1) A really idiotic person (2) A cast member of the online show Dumbass (3) Dumbass: The online show in which a group of kids go around their town and neighborhood filming themselves doing stupid things then putting the footage in episodes and up online.
Ben, The Jew is on the online show, Dumbass. Brenden isn't on the show dumbass, but he/she is a f***ing gayass.
dumbass by Lemon April 20, 2006
A person who pronounces nuclear as "nuke-you-lar."
dumbass by boots July 22, 2004
dumb-ass..............idiot..... dumbass? what where you thinking?
Dumbass by the guat April 9, 2004

Dumbassitasic 

Main Entry: Dumbassitasic
Function: adjective
American late 90's-Tim W. Green
1.Extreamly messed up,unbelievably dumb.
Todd, that is so Dumbassitasic why did you ever date that girl?
Dumbassitasic by Tim Green October 17, 2004