one-liner

noun4

1. •
   A short joke, especially one of a single sentence.

   • ALMOST without exception, Moore’s narrators have comic yet dark stories to tell: they fire off crisp, De Vriesian one-liners and then, when you least expect it, sneak in wrenching revelations. — 1994
2. •
   A short remark intended as a sound bite.
3. •
   A command or small program consisting of a single line of input.
4. •
   A chat feature on a bulletin board system or web page where users can post a single line of text at a time.