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An abnormally tall person with disfigured facial features.
Oh my gosh, that tall guy Jason is such a fiant.
by FBMystery January 29, 2009
A bit like giant, but "fucking" epic in comparison.

(Fucking + Giant = Fiant)
Going to have an fiant game of boulderdash this weekend, are you in?
by jimbo jones 47 July 04, 2009