Definition of "Guy" :
noun: a cable, wire, or rope 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
"A nice guy."
verb: steady or support with a guy wire or cable
"The Italians guyed the Tower of Pisa to prevent it from collapsing."
verb: subject to laughter or ridicule