Definition of guy:
(n) :
a support cable used to guide, steady or secure something; an
effigy of a man burned on a
bonfire on the anniversary of the
Gunpowder Plot (5th November)
"a new guy started at the office today."
(v) :
to exhibit an effigy of Guy Fawkes around the 5th November; to
make fun of, to ridicule with wit or innuendo