A variation of the term "asswipe" In which you are referring to someone as:
1. A complete asshole 2. A material used to wipe excretion from the anus. see asswipe, shitsleeve, ass-garb ect.
a shitty twist, a twist or swerve in a plot that is unsatisfying or makes poor logical sense once the initial shock of the twist occurring has worn off
Most of M KnightShyamalanmovies in with a shitwist that make them unfun to watch again.