One-Liner

Kat: Now say something witty to the Enigmarons and finish the mission! Antimony: Do I have to? —Gunnerkrigg Court

"Enough is enough! I have had it with these motherfuckin' snakes on this motherfuckin' plane!" —Neville Flynn, Snakes on a Plane

Any line of dialogue which demonstrates remarkable wit and composure for someone in that particular situation. Whereas a normal person would freak out upon finding (for example) a pack of dogs mauling a dead lawyer, the main character gives a wry smirk and says, "Well, I always said the legal profession was going to the dogs," thereby proving that they're Just That Cool.

Differs from a Catch Phrase in that repetition is a key component of the Catch Phrase. The One-Liner is typically used once and never again.

Variations and Sub-tropes:

• Bond One-Liner
  Just after killing someone.
• Facing the Bullets One-Liner
  Facing down death.
• Incoming Ham
  When a character enters the scene.
• One-Liner Echo
  When it is reinforced by immediate repetition by others (non-immediate repetition by the same character elevates it to a Catch Phrase).
• One-Liner, Name. One-Liner.
  When it is addressed to a character and then repeated by the original speaker.
• Parting From Consciousness Words
  Immediately before passing out.
• Pre-Ass-Kicking One-Liner
  Just before a fight.
• Pre-Mortem One-Liner
  Delivered just before the killing blow; in other words, used to end fights.
• Quip to Black
  Used to segue into a commercial break.
• Schiff One-Liner
  Used to end an episode in a rather dark way.
• Wham! Line
• Why Can't You Say Good Night?
  Delivered after Slipping a Mickey but before the victim departs from consciousness.