Definitions of guy:

• noun:   a rope or cable that is used to brace something (especially a tent)
• noun:   an effigy of Guy Fawkes that is burned on a bonfire on Guy Fawkes Day
• noun:   an informal term for a youth or man

  Example: "A nice guy"

• verb:   steady or support with with a guy wire or cable

  Example: "The Italians guyed the Tower of Pisa to prevent it from collapsing"

• verb:   subject to laughter or ridicule
• name:  A male given name (common: 1 in 1666 males; popularity rank in the U.S.: #252)
• name:  A surname (common: 1 in 7142 families; popularity rank in the U.S.: #876)