Gaping Bernard
When you bang a girl in her ass and while it's gaping you take a shit in it. Similar to a Monroe Transfer butt a little more personal...
While banging Tara in her ass, I suddenly got the urge to take a shit, so I did what any guy would do in that situation - I pulled out, noticed that her asshole was gaping, went Butt to Butt, and proceeded to shit in her ass. While taking this dump it occured to me this is - "The Gaping Bernard."