Someone without a clue as to what is going on and/or generally has bad reflexes.

May occasionally do something stupid by accident (tripping, falling, etc.)
That doofus over there just walked into a stop sign!
by HiPeople March 22, 2010
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The pinnacle of being a blonde; a girl with no clue; oftentimes nieve (though sometimes in an endearing way); a person who likes bad basketball teams, any girl named Katie.
That girl just dyed her hair blonde, as if we didn't already know she's a doofus.

She just picked UNC to win at basketball, she must be a doofus.

Yep, her name's Katie...she must be a doofus.
by theman85004 January 07, 2007
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Doofus is a dipshit and dumb person. They are easily triggered and sometimes resort to youtube to vent their anger.
by BruddahIceCreamChips January 11, 2018
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Someone who's too dumb to know the difference between the word "doofus" and "dufass," then attempts to backpedal by lying about "dufass" being an actual word.
Honestone insists that "dufass" is a word, which is exactly why he's a doofus.
by Honestone July 17, 2015
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