A woman who possesses a beautiful round posterior, but unfortunately is otherwise quite unattractive.

Someone who is possessed by clout chasing. The original human is now gone and a demonic entity that feeds on clout is all that is left. An empty shell with no control of their actions, forced to blindly react to situations they think will bring them attention.

A donkey, (equus asinus) with an abnormally large posterior (gluteus maximus).

Or, an ass with a big ass.

A person who is a jerk, with a large buttox.

A girl that when at first glance, and viewed from afar, appears to have a sweet ass and tig ol' bitties, but upon closer inspection turns out to have a jacked-up donkey face.