look up any word, like smh:
 
50.
Someone who constantly brakes things and acts like an idiot and never listens no matter how many times you tell them something. Usually thinking they are funny, dumbasses usually do incredibly stupid things. If you are doing things like tripping over curbs or driving 50 km down a road with your turn signal on you just might be a dumbass.
Wow look at that kid tripping over the curb what a dumbass!
by papaloki July 31, 2006
 
51.
1) a person that is unable to justify their actions, or lack there of, with a logical reason

2) a person that partakes in an activity that may be deemed as dumb by you or the general public

3) partaking in an activity to spite someone that will have a greater degree of negativity on the way others view you than it will on the person that you are trying to spite

4) a person that does not understand the words used in the previous definitions
You dumbass.

Don't act like such a dumbass.

(the word dumbass can, for the most part, replace any word that has a demeaning connotation)
by does it really matter?? September 30, 2004
 
52.
"Dumbass" is a redundant term. An "ass" is a fool and "dumb," of course, means stupid. Hence, "dumbass" means "stupid fool." Is not it more efficient simply to call someone ans "ass?"
by Paul Thundergod June 26, 2003
 
53.
A guy I know named Aaron who is an idiot and basically a complete screw off until the last minute and even then.....
Aaron: Hey dude how do you convert a decimal into a percent???
Some Random Person: Jeez your suck a dumbass.
by Game Crazy February 02, 2006
 
54.
The man who lost the popular and electoral vote.

See John Kerry
Looks like that dumbass didn't win enough votes. I guess I'll move to Canada.
by John Cusack November 20, 2004
 
55.
a donkey, or any other similar creature of unusually low intelligence
Guy: Come and buy this dumbass cheap
AnotherGuy: Damn that's a dumbass
by anotherguy November 11, 2003
 
56.
90% of the people who post on this site
I can't believe that any dumbass can post whatever they want
by antihate July 05, 2003