If on the other hand, you are like Stradlater and happen to date your friends' ex's, then here's one for you to decapitate that friendship.
"Hey, [dude/lady], I just used Zombieland rule no. 2 on your ex-[girl-/boyfriend]."
Then do a follow up post.
"I double tapped them."
Keep it classy? Of course not, you're rolling like Stradlater.