The phrase uttered right before one person's heart is pierced with a metal object. This phrase can also be used to describe the feeling one gets after they run out of pie.
Guy 1: Duuuude, howdja get that Ipod touch?
Guy 2: i could tell you, but then i'd have to kill you
Guy 1: is that a no?
Guy 2: WTF was that supposed to mean?
Guy 1: you tell me,
Guy 2: NO!