horse of a different color
- (idiomatic) An unrelated or only incidentally related matter with distinctly different significance.
- 1908, Harold MacGrath, chapter 22, in The Lure of the Mask:
- "Against physical danger I am willing to offer myself at any time to your Highness . . . . But to walk straight into jail, with my eyes open, that's a horse of a different color."
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