Top definition
(the act or attribute of being) complancently stupid
I was rather fatuous watching television all day
by Bedfellows May 30, 2006
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2
Foolishly self satisfied
by Miss Crazy Priss February 27, 2005
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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3
Unconsciously foolish.
Person 1: They are acting so fatuous!
Person 2: Try telling that to their faces! They will not stop!
by PandaGirl xox May 30, 2016
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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