The act of ass-fucking a girl, getting shit on your cock, and then alternating between fucking the anus and the vagina.
I was ass-fucking Cheri last night, and I decided to switch over to the pussy for the Rusty Monk. It was totally sweet.
The act of anally penetrating a partner so rapidly that the condom melts.
Sue made me wear a rubber last night when I gave it to her in the ass, so I banged her so fast she got her a Kentucky Hot Brown. Boo yeah!