Dumza 

Driver Unable to Maintain Zero Acceleration

I was having an uneventful drive on the turnpike, when

I encountered a cluster of traffic, with a Dumza in the left lane who kept accelerating to 80 MPH and then decelerating to 55 MPH.

Dumza by brett1323 April 20, 2010

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

Dunbartonshire Dumbarton Complex

Dunbartonshire Complex means having that state of mind thinking association with or living with people from Dunbartonshire, Scotland makes one dumb.

The Kiltbearers were aghast by Oprah after she showed signs of having Dunbartonshire Dumbarton Complex.

Dunbartonshire Dumbarton Complex by Cyclonetrading July 6, 2021

dumbarrassed

To be embarrassed over really dumbass shit.

Never feel dumbarrassed by idiots.

dumbarrassed by jpg3 December 7, 2011

dumbass dad 

When ur dad is a asshole who is emptyheaded and has now real brains but acts like he knows about anything

I have a dumbass dad i think just knowing him makes me stupid

dumbass dad by .Pyro. March 1, 2018

Dumbarton Complex 

Any dumb person who thinks that Dumbarton translates to being "dumb."

Jessica refuses to live in Dumbarton because people might think she is dumb. Oh boy, she has DUMBARTON COMPLEX.

Dumbarton Complex by Cyclonetrading July 6, 2021