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
Get the Deciduous Dumbassmug. 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 December 9, 2008
Get the drunken dumbassmug. by Honeydew Melon Hater June 10, 2022
Get the Perennial Dumbassmug. 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
Get the Alexander Dumbassmug. by Pee-wee Jones April 21, 2020
Get the Isaiah the dumbassmug. 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
Get the dumbass energymug. 