A$$

(_!_) a regular ass

(__!__) a fat ass

(!) a tight ass

(_*_) a sore ass

{_!_} a swishy ass

(_o_) an ass that's been around

(_x_) kiss my ass

(_X_) leave my ass alone

(_zzz_) a tired ass

(_$_) Money coming out of his ass

(_?_) Dumb Ass

This one would be me...
(_E=mc2_) a smart ass