Ass shows up a lot on Strong Language. We’ve looked at kick ass and my ass, lick-my-ass and assclowns and asshats, among other-ass things – or other ass-things, if you prefer the xkcd hyphenation. (See Language Log for a lit-ass –ass lit review.)
As a suffix, –ass is used to form ‘generally negative (but increasingly positive too) adjectives and occasionally nouns’, notes Green’s Dictionary of Slang. This Janus nature recurs in slang, as in the contradictory shit vs. the shit. And you can’t spell Janus without anus.
A search for ass on GDoS currently yields 137 results, and the main entry for ass (n.) has 184 subentries, with compounds like ass-bucket (‘unpopular or unimportant person’) and expressions like give up the ass (‘accede to seduction’) and up to one’s ass in alligators (‘in very serious troubles’).
Ass, in short, gets around. It’s a seriously productive-ass piece of vocabulary.
Strong Language 