n. A person possessing a fucked up ass; a person whose ass is fucked up. Used only in reference to aesthetics(i.e. corpulence and/or bad genes) and not with reference to violence or the threat of violence.
See also FUF one with a fucked up face or FUB one with fucked up boobs
Holy shit, did you see that FUA!
Man, look at that FUA. I don't know whether to cry or fuck.