When someone isn't actually a dumbass but they act as one due to a lack of care on the opinions other people might have on them
by SumRendomDumbass October 14, 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
Someone whose intelligence, or lack thereof, is seasonal and inconsistent. (See also perennial dumbass.)
"Sometimes they can be really smart, but other times they say the dumbest shit, you never know what you're gonna get. God, they are such a deciduous dumbass."
by Honeydew Melon Hater July 12, 2022
by Honeydew Melon Hater June 10, 2022
Isaiah the dumbass
by Pee-wee Jones April 22, 2020
One who displays actions of extreme drunken dumbassness and or bitch assness while inebriated, especially in such settings as a fraternity house.
by a_dub21 October 07, 2008