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

by jojo77 January 2, 2013

by CheesyMcCheeseMan December 26, 2020

a random kid you meet online in a video game, usually halo, call of duty, battlefield, or gears of war. they think they are the best players ever, but actually suck.
by DumbassRandomScrubGuy February 3, 2012

Coach dumbass is the coach that loves to do shit like bang his head in walls and forget to start the clock for practice. Often sets himself up to be the butt of the joke.
by Dsanchez August 18, 2018

by poiuegwciewulq December 15, 2019
