Unique as the only word in the English language to sound like a variation of it's slang definition. In other words: It sounds like it may actually mean "full of feces" although it does not...but it does mean full of shit.
After telling that joke he said he was being facetious, but we all know he was just looking for a smarter sounding way of saying he was full of shit.
by MoTremper September 7, 2007
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The only word that has A E I O U in it in that order
Did you know that 'facetious' is the only word that has A E I O and U in order?
by Ein Wrose April 5, 2011
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Being facetious is when you say something you think is funny, but NOBODY laughs. So then you have to say "Oh, uh...I was being facetious". And everyone's like "Ooooh Kayyy... (What a jackass.)"
"An awkward silence fell over the group after his facetious remark about the director's 'ghetto booty' wasn't appreciated.
by ~Adam September 15, 2006
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Sinead: Hey, stop being so facetious.

Me: That's not a real word and you know it
by superduckisalive April 14, 2008
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pronounced FOO-SEE-SHE-OUS

Describes a closeted black man whom wants to appears straight especially within higher educational setting such as universities and colleges.

Will typically be humorous about himself being straight where it is almost noticeable. Basically he is being facetious about who he is.

It can also be used in the pejorative to insult someone based on their sexuality.
"WHY YOU SO FACE-TI-OUS?"

Person1: hey what's up with cody last night?
person2: yeah, he was really facetious last night
person1: oh, i had no idea
by facetiousman June 6, 2011
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'facetious' to lovers of olde English
"Grandmother: Bwoy, yu bring dat dutty footbottom inna mi house?

Grandson (puzzled): But, Granny, mi put on mi shoes.

Grandmother: Bwoy, yu facety eee? Ooo yu t'ink yu talking to?

Grandson: But Granny ...

Grandmother (interrupting): Bwoy, shut yu mout'. Don't talk when me talking. Cho, too facety!"
by Funkg January 8, 2013
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