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