The face where the lower jaw protrudes past the upper jaw and the eyebrows furrow into a particularly ugly line; usually used when in extreme distress. May also be natural face of ultimately unattractive people. Especially found on people who think that they are better than everyone else.
(1) Whenever my dad gets upset with me, he gets the Ultimate Fug Face.
(2) Wow, did you see that girl? she had a permanent U.F.F. I wonder what pissed her off today. Probably her face is just like that naturally.