Dumbcrap is a word generally used as an insult to another person which is formed from the two words: Dumb and Crap. You are essentially calling someone Dumb and a 'Crap'.
by JewlRew May 21, 2018
by i forgot April 28, 2005
variation of words like "dumbass" "dumbfuck" and "dumbshit." Means someone stupid or someone who does stupid things.
"Why did you call the cops, dumbcrap?!"
by Laurie March 21, 2005