a whole nother story

a whole nother story

informal Used to emphasize the difference between two things being discussed. A: "OK, so that's what happened last night. What happened with Jack?" B: "Oh geez, that's a whole nother story!" My back is feeling better, but my head is a whole nother story.
See also: nother, story, whole
Farlex Dictionary of Idioms.
See also:
  • nother
  • happen by
  • happen on
  • happening
  • happen (up)on (someone or something)
  • happen along
  • boom goes the dynamite
  • dynamite
  • a night to remember
  • (as) pissed as a newt