Dumbarhea 

When you say something dumb, and while trying to fix it, you sound even more dumb. Like diarhea, the dumb keeps flowing.

Bob said something stupid to Jan. As he explained, he kept saying stupid things. Jan told him he had a bad case of dumbarhea and left.

Dumbarhea by AKW-AS August 26, 2018

dumbarrassed

To be embarrassed over really dumbass shit.

Never feel dumbarrassed by idiots.

dumbarrassed by jpg3 December 7, 2011

dumbhead 

A head that is dumb.

"You're a dumbhead!"
"Look who's talking, dumbhead!"

dumbhead by Shaka, Zulu Warrior May 22, 2006

Dumbarse 

Standard British slang meaning someone who is dumb, stupid, annoying, similar to the dumbarse American dumbass.

This is a dumbarse site.
My headmaster is a dumbarse.
The American's have such dumbarsed slang.

Dumbarse by mkk December 28, 2005

dumbohead

A person who usually shows some sign of intelligence (not completely necessary though), but has brief lapses where they act completely retarded and senseless.

Willie: My mother said it's the law that I need to have my permit for another year before I can get my license...

Dan: Willie, did you notice all of us only had our permits for six months? We're two years younger than you and have our licenses already.

Willie: Durrr, I didn't really think about it... *proceeds to stare off into the distance with a blank look while making indistinguishable noises*

Dan: Frickin' dumbohead...

dumbohead by D Pat September 12, 2007

Dumbarted 

A mix between being a dumbass and retarded

Man, I fell really dumbarted for asking Liz out on a date.

Dumbarted by Sam Kovacs October 14, 2009

dumbhead moron

Someone who uses words such as gurl instead of girl, boi instead of boy, and other really retarded and lazy stuff like that.
Sort of similar to lazy freak

All dumbhead morons should be kicked off of the internet from this second on for the rest of eternity.

dumbhead moron by dref said right June 10, 2004