Top definition
A person that isn't too bright. usually used as a joking insult, as it is hard to keep a straight face while saying this.
Luke: I can't believe i lost. It's all your fault chris!
Chris: How is it my fault? i wasn't even there!
Luke: Because you looked at me funny yesterday
Chris: i don't get it
Luke: Dumbfat
by Blackout0217 December 15, 2009
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