A complete asshole. One who makes you feel like shit. One who says the most stupid things; annoying. Can also mean you secretly love them.
"wtf is ur problem you whore.
God ur such a dumbfuck."

"you wore that shirt like two days ago.
Shut the hell up, you dumbfuck!"

"seriously, why do people go tanning?
well, you dumbfuck, to get tanner."

"ah cmon, dumbfuck..be my partner."
by Karlayyy. March 2, 2009
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1. A stupid person 2. An idiot 3. Someone who acts like a fool
"If you think I'm gonna believe that shit, then your a dumbphuck."
by Beep Bepp July 14, 2003
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The act of being dumb with a sprinkle of wtf.
These people have no boundaries of dumbfuckness!
by MCNS February 26, 2016
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People that play Fortnite all fucking day.
"Do you play Fortnite?"

No dumbfuck quit asking!
by Drreppep1_2 October 29, 2018
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A person who can't stop from getting involved in fights he/ she can't win. Copious amounts of alcohol usually helps bring out their inner dumbfuck.
'Hey Dave... What is that guy doing? He will never win that fight... is he retarded?'
'No Jon, he is simply a dumbfuck.'
by krisd44 April 24, 2018
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