"Intelligent-dumbass" can be defined as an individual who possesses a high level of intellectual capability, often measured by a high IQ, but consistently displays a tendency to perform simple tasks or make decisions in a foolish, silly, or inept manner. This term highlights the paradoxical combination of intelligence and a lack of practical wisdom or common sense in certain aspects of their behavior.
by BAHY DEFUHNISHUHN August 30, 2023

Jake: "Dude I just remembered that time in 7th grade I dated Meghan."
Will: "Ew that ugly bitch?"
Will: "That's some serious dumbass nostalgia, Jake."
Will: "Ew that ugly bitch?"
Will: "That's some serious dumbass nostalgia, Jake."
by asadaa October 23, 2010

When an individual is so exhausted that their cognitive skills are compromised, effectively lowering their IQ
Jules was so fatigued after the long hours of driving that she could not remember whether to put out the recycling, the garbage, or the cat. Swaying with exhaustion she exclaimed, "I put the milk in the closet and the detergent in the fridge just now. I am officially dumbass tired!"
by Jules.Sheehy July 13, 2016

A noun used to describe a person who rushes into abnormally stupid activities or situations he/she has no cause to be in or ability to successfully negotiate. i.e. one who "thunders" into stupid shit like a dumbass, hence the term. Usually reserved for those who are dumbasses to such a high degree / perform acts of dumbassery on such a regular basis, they require their own classification.
Al: "I'm going to go fight in a martial arts tournament on Tuesday."
Sal: "Dude, you've never taken martial arts before. You'll get your ass kicked. Why are you always looking for a fight?"
Al: "Nah man I'll fuck up anybody who tries that Judo shit on me"
Sal: "Stop being a thundering dumbass. Just have some drinks with the boys instead."
Al: *proceeds to get his ass kicked on Tuesday*
Sal: "Dude, you've never taken martial arts before. You'll get your ass kicked. Why are you always looking for a fight?"
Al: "Nah man I'll fuck up anybody who tries that Judo shit on me"
Sal: "Stop being a thundering dumbass. Just have some drinks with the boys instead."
Al: *proceeds to get his ass kicked on Tuesday*
by the bad Ag February 21, 2019

Then the contestant, reacting to the audience's laughter after she identified the author of The Three Musketeers as "Alexander Dumbass", said, "No...wait... Henry Dumbass!" -- from the Pardon My Blooper album, 1957.
by Zappin' Nap March 31, 2020

by UwU.ai September 3, 2020

An Urban Dumbass is a staff member at urbandictionary.com who cancels your submission before it even reaches the editors. This person is often a huge douchebag who rejects your defenition just because his dumbass doesn't understand It. He will let completely lame trash pass as a definition, just because he understands the It, yet he'll cancel good and useful defenitions that don't break the rules.
Note: The Urban Dumbass should not be mistaken for the Urban dick
Note: The Urban Dumbass should not be mistaken for the Urban dick
Guy 1: Hey did the definition get passed, man?
Guy 2: No, the Urban Dumbass rejected It cuz he didn't understand It.
Guy 2: No, the Urban Dumbass rejected It cuz he didn't understand It.
by UglyFatBoy98 May 29, 2020
