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A person who knows what you mean when you say something but acts confused.
Jonny: I have food on my table and a roof over my head. I am blessed.
Stevens: What kind of a house doesn't have a roof?
Jonny: It's a saying you dumb fuck!
Dumb fuck by Vam Pire 101 August 17, 2017
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

holy dumb fuck 

if you have tourettes this is a very commonly used phrase. it is generally said when you are taking a shit
holy dumb fuck by boobie bobbler November 20, 2007