The Collaborative International Dictionary of English v.0.48:
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
The lady . . . who dresses like a guy. --W. S.
2. Hence: A person of queer looks or dress. [Chiefly Brit.
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]
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
great guy a man who has a very pleasant personality,
typically one who is friendly, generous, and pleasant to