a clueless person, most always lacking even the most basic social skills. a doofus often thinks they are a bit smarter then everyone else.
when a doofus makes silly comments at the dinner table and everyone rolls their eyes they think everyone got something in their eye at the same time.

A doofus views defeating a 6 year old at a game of tic tac toe
as an accomplishment to be bragged about.
A doofus does not understand why you are not fairly impressed by this.
by thederby October 2, 2012
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doofus is a word to call someone who you really like as a way to tease them.
ugh you’re such a doofus ;)
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some one stupid.
from the word doof which is german for "stupid"
oh mai gard ur such ay doofus
by Dux00rs July 11, 2004
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someone totally stupid, dumb and clueless (zong)
omgsh that zong is such a doofus
by Yummy girl asia December 10, 2006
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