Somebody born on accident as a result of the parents being dumb and not wearing condoms. "Dumb fuck" is an insult often used against stupid or ignorant people, or by ignorant people against people that are actually smarter than them.
1. Pi is actually 3.14.

2. SHUT THE FUCK UP DUMB FUCK.
by machonacho November 14, 2009

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A really stupid person
My brother Billy is a wicked dumbfuck
by DizzyLizzy September 04, 2007

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1. someone who puts a picture of him/herself in the definition for a word such as gangsta or pimp.
2. someone who writes a definition about a friend.
1. See the entries for gangsta, pimp, chav, shocker, etc. If only they put their pictures in dumbfuck, too.
2. Example definition for "brian"
The hottest guy ever. I love him :]
2a. Another example definition for "cool"
Something shirley is not.
by 340yhj3jh3=2qhnn September 18, 2008

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The Urban Dictionary T-Shirt

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Someone who repeats an action over and over again, expecting a different result"....
George Bush: 'how'bout i bomb this....yeah oil prices/terrorism..GUNS'...dumb fuck
by Jonny Howard October 12, 2006

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The Urban Dictionary T-Shirt

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someone who tries to define a word and doesn't even know how to spell "definition"
Who is the dumb fuck that doesn't know how to spell?
by kuntrysgirl December 30, 2005

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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Someone who uses urban dictionary to shit on someone else's political views, then uses a misonginistic example in their definition.
That dumbfuck who posted an earlier definition by citing liberalism and femine "drunkity" is such a dumbfuck. I'm talking about the dumbfuck who posted the 13th definition here.
What a goddamn dumbfuck.
by the_old_days January 09, 2010

The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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Dumb as a box of rocks.
George "Dubya" Bush doesn't know the meaning of "dumbfuck" because he is a .................
by auntegg April 15, 2006

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt