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 August 1, 2006
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You.
Insert your name here is a dumbass.
by skitzo August 27, 2003
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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
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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
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something that starts with a d and ends with a bass.. theres a little ummm in the middle.. thus D-UMM-BASS..
err this is such a dumbassedly dumbassed definition... alliteration is the name of the game...
by queen of the GRasslands August 29, 2006
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1. a person at school that is so damn fat and retarded they have conversations in the middle of the hallway and block causing all kinds of student traffic
2. john kerry
3. a hobo i saw that mugged a little child for his happy meal
dumbasses are usually fatasses
by PlayDohMan October 2, 2004
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an extreme of something, can be used as an adjective.
That fool is dumbass high

There were dumbass RDB' s at that party last night.
by george tedbetter July 24, 2006
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