Dumbis 

A derogatory slang term for a specific type of metal head that is extremely elitist, is rarely seen in places other than the internet, listens to doom metal, plays Dungeons and Dragons, World of Warcraft or engages in some other type of nerdy activity. A dumbis is usually fat and will dress in cargo shorts, skate shoes, and an Isis shirt. Dumbi rarely have long hair like other metal heads, instead opting for a long neck beard or slightly "shaggy" hair.

Comedian and actor Brian Posehn is a dumbis.

Dumbis by BroUpBroDown February 26, 2011

Dumbis 

a slang term for a specific type of metal head, that is usually fat, nerdy and wears cargo shorts. Dumbi generally listen to sludge metal, and are very pretentious. They'll talk your ear off about Dungeons and Dragons too.

Comedian Brian Posehn is a huge dumbis.

Dumbis by blackmetaldumbis March 3, 2011

Dumbis 

One who is dumber than usual.

John is such a Dumbis, he lost his keys to his car.

Dumbis by Scott Warshire August 19, 2007

Dumbis Cuntis

Latin for Dumb Cunt

Nigel : Pardon my interruption Roger......over there.....is that a gaggle of dumbis cuntis?

Roger : Yes....yes indeed it is...great spotting my dear friend!

Dumbis Cuntis by DerekKickett January 1, 2012

Urban Dictionary Dumbass 

Someone who writes Urban Dictionary definitions about themselves, or people who they know, but who are not famous. Esp. when those definition is "*insert name here* is very cool and attractive."

Person 1: Hey! Jeremiah defined himself on Urban Dictionary!
Person 2: What an Urban Dictionary Dumbass...

Urban Dictionary Dumbass by Snowskeeper February 25, 2013

Professional Dumbass

Someone who does stupid shit so often, they somehow become proficient at doing it well

Stan is a professional dumbass, he keeps getting himself out of stupid situations

Professional Dumbass by Garlic S August 25, 2020

Dumbassness 

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...

Dumbassness by nachomama April 17, 2012