look up any word, like darude - sandstorm:
 
1.
The dumbass that has to open their car door in the drive through because their window doesn't work, then makes excuses for it.
I'm a McDumbass, sorry, my window doesn't work.
by Carekey March 10, 2005
51 11
 
2.
(n.) A McDonald's employee who messes up orders.
These guys always screw up our orders! What a bunch of McDumbasses.
by Shermanator239 July 27, 2010
6 0
 
3.
A serious dumb-shit person like everyone who works at Mcdonalds.
I was getting food from mcdonalds and the cashier was a complete McDumbass
by I dont wanna!!! October 19, 2011
1 0