{n. phr.}, {informal} Something altogether separate and different. * /Anyone can be broke, but to steal is a horse of a different color./ * /Do you mean that the boy with that pretty girl is her brother? I thought he was her boyfriend. Well, that's a horse of another color./
HORSE OF ANOTHER COLOR
Meaning of HORSE OF ANOTHER COLOR in English
Dictionary of English idioms . Словарь английских идиом. 2012