pronounced: (DUMB-ASS-uhh-tree). VERB. A synonym for the word shenanigans. The act of committing shenanigans is the same as dumbassitry. Another word for the random stupid things people do for fun.
Brad and his friends are pulling their usual dumbassitry by running around without clothes or simply ripping paint off walls.
by Tark NE1 January 24, 2014