'great guy' definitions:

Definition of 'great guy'

From: GCIDE
  • guy \guy\, n.
  • 1. A grotesque effigy, like that of Guy Fawkes, dressed up in England on the fifth of November, the day of the Gunpowder Plot. [1913 Webster]
  • The lady . . . who dresses like a guy. --W. S. Gilbert. [1913 Webster]
  • 2. Hence: A person of queer looks or dress. [Chiefly Brit. slang] --Dickens. [1913 Webster]
  • 3. A man or young man; a fellow; -- usually contrasted with gals or girls as, it was fun for both the guys and gals; the guys were watching football while the girls played bridge. [Informal] [PJC]
  • 4. A member of a group of either sex, usually a friend or comrade; -- usually used in the pl.; as, tell the guys to come inside; are any of you guys interested in a game of tennis?. [Informal] [PJC]
  • great guy a man who has a very pleasant personality, typically one who is friendly, generous, and pleasant to associate with. [PJC]