Refers to a person/scenario who/that is beyond the point of ugly and who/that is F***ing hideous.
My grandmother naked is a fideous image.
by Phobese Bob January 17, 2012
Fideous:Fucking Hideous, a train wreck of hideousness
That out fit she is wearing is fucking hideous, it's FIDEOUS!
by Steven Cincotta December 10, 2006