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1. Someone who gets easily confused and fails to use common sense when neccessary.

2. Someone who is so fucking stupid you want to meet their parents so you can pour hot coffee on their face.
Woman: I'm kind of hungry.
Man: Ok, let's grab a movie.
Womam: Seriously you dumb fuck, I said I'm hungry.
Dumb Fuck by mmhmm2121 December 16, 2010
A dumb fuck is someone that is undeniably stupid, they can't get their life together because of their epic level of stupidity, so they just continue to do dumb fucking shit, like dumping their millionaire girlfriend for an old Filipino prostitute that's married and has a kid.
(A) Have you ever met that guy Toby?

(B) No, I don't think I have...wait! Is he a dumb fuck?
(A) Yes! He's the guy I was telling you about, the one who got engaged to a married Filipino prostitute.

(B) Woah, he really is a dumb fuck.
Dumb fuck by Honestyyyyy December 8, 2014
Probably you considering that you searched this
A person who is dumb beyond belief. Not someone named Kate.
Dumb fuck by lycheeh8r January 27, 2012
1. A person is so incredibly stupid that it is not even funny any more.
2. The current occupant of the White House.
dumb fuck by jesster79 January 18, 2006
Usually refered to a person that did something really dumb or something stupid, this doesn't actually mean a person is dumb or a fuck
You spilled it all over my shirt you dumb fuck!
dumb fuck by smart person December 24, 2004