Siberian Turnaround
It's when you take or meet someone at a bar, leave the bar to have sex with that person, and then return to the bar and continue drinking.
Paul: "Where'd you go?"
Gerald: "I had sex with that chick."
Paul: "And you came back! You just pulled a Siberian Turnaround!"
Gerald: "I had sex with that chick."
Paul: "And you came back! You just pulled a Siberian Turnaround!"