A dumbus is a person who is simply very dumb and idiotic

Almost the same as a dimbus but worse
Person #1 Hey look at that hole in the pavement!

Person #2 I'd be careful around that
Person #1 But it looks cooollll we should go in it
Person #2 No you dumbus shut up and keep walking

Person #1 Ugh fine you stick in the mud
by Cutie Queen June 13, 2017
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Free-wheeling, no-holds-barred, brain damaged, extreme no limits stupidity and dumb rolled into one super special stupendous package.
My Drugzilla neighbors went dumbu from hoovering too many drugs and start eating cockroaches in exchange for drugs.
by Jamiesaurus March 11, 2021
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Used when someones being a dumbass but you dont care enough to say or type it
You're such a dumbus Bob give me the dog back
by Uno_Bruno October 23, 2022
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