(n.) the sexual intercourse that you have after a truly great achievement
Guy: "I just got accepted to Harvard, baby!"
Girl: "Well why don't you go upstairs?"
Girl: "I'm gonna rock your world with some epic victory sex!"
What President Barack Obama had with First Lady Michelle Obama on the night Osama bin Laden died.
"I did indeed have victory sex with my wife Michelle on the night of May 1st" - Barack Obama