Similar to fucking nasty, but with the ommitence of the "uck" and the "ug" in its place, bringing with it an element of offensive ugliness similar to "fugly". To break it down would give you the three words: fucking ugly nasty
Those chili-cheese burgers from Carls Junior look fug nasty.
That new Paris Hilton flick "The Hottie
and the Nottie" looks fug nasty.
some one who is beautiful and has 236 cats and lives alone and you can never go out with her because she had her heart broken and will never be satisfied by a man again!
"Karen your such a thug nasty geese! Why don't you get off your couch and stop playing with your cats; and fall in love again?