Kinktionary
More like guidelines and a lot less like definitions.
Ass Centric
A person of any orientation whose primary focus of attraction to another person is their ass. They are driven by a core appreciation of the ass in its natural form. This may not necessarily indicate a specific desire for anal play (either giving or receiving) but that could be the case as well. Ass centric may also be called "butt centric." A more gendered version of the term is "assman."