A non communicable disease that tends to affect young adults but may be noticed in older individuals who continue to be carriers for many years to come.
It was out of sheer dumbassness that he opted to get drunk and get into an arguement with a cop...
by nachomama February 17, 2012
a person/animal/other organism that does actions/things that are unfavorable and seen by others as stupid, it's also an insult to a person who is pea-brained.
bosco:10+10 is not twenty it don't have ten in it!
Damien: bosco u fucking dumbass it doesn't need to have that to be twenty
Ben:seriously bosco, did you skip 1st grade or something?
by a wild bandaid May 7, 2017

1. Someone who attempts to be a smartass but is too dumb to actually succeed.

2. Someone who holds a stupid, illegitimate or completely baseless opinion with a perplexing amount of self-righteousness.
Guy 1: I think it might be time to have that compound fracture looked at by a doctor dude.
Guy 2: Nah the problem would get compounded Lol
Guy 1: WTF? You are such a dumbass.

Guy 3: Hostel is the best movie that was ever made ever!
Guy 4: Oh my god what a dumbass...
by IQuarent April 14, 2015
A criminal offense in which a person acts like a dumbass.
Johhny was caught wanking in his car. He will be convicted of dumbassism.
by r-u-done April 13, 2005
A person is both stupid (e.g. dumb) while also stubbornly refusing to stop being stupid when asked (e.g. ass)
I couldn't teach him how to use the paintball gun because he was running around with it between his legs like a dumbass.
by dumbass September 17, 2003
somebody who answers when you yell "hey dumbass!"
mean person:hey dumbass!

by Big LJ October 17, 2006
Your a dumbass
by A bitchy kid November 6, 2020