1. as a question it can be used to question someones stupid statement.
2.A way to tell someone they are not intellegent.
1. man1: My house flies into space at night.
Me:Are you fucking dumb?
2.Man1:Should we go to Canada tonight?
Me:no don't be fucking dumb, you must be the epitome of dumbassery
by mike1117 February 02, 2010
by stinksTheCat February 14, 2011
it means you are stupid, but not just a little stupid. If someone calls you that, they mean that they are mentally ill and need to seek help.
It's a pretty good word to use if you like it.
by Claude Ballz June 11, 2004
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!
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.
by mmhmm2121 December 15, 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.
by Honestyyyyy December 08, 2014