the term for someone that takes the joke too far, and therefore ruins the fun you and your friends are having. the person has just killer, or Miller'd, the joke. In other means, this person is a Banter-Killer.
Guy: ...and finally I pissed on her tits!
Guy 2: Dude, you just Miller'd it!
Dude: Why does the chicken cross the road?
Dude 2: I dunno, why does a chicken cross the road?
Dude: (shouts) COS ITS GAY!
Dude 2: Oh man, you just Miller'd it