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

by CheesyMcCheeseMan December 26, 2020

by Tommy Princess May 24, 2021

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

by UwU.ai September 3, 2020

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

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
