Definitions
1.nounAn effigy of a man burned on a bonfire on the anniversary of the Gunpowder Plot (5th November).
2.nounA person of eccentric appearance or dress; a "fright".
3.nounA man, fellow.
4.noun(especially in the plural) A person (see usage notes).
5.noun(of animals and sometimes objects) Thing, creature."The dog's left foreleg was broken, poor little guy."
6.nounThing, unit."This guy is the partial derivative of that guy with respect to x."
7.noun(term of address) Buster, Mack, fella, bud, man."Hey, guy, give a man a break, would ya?"
8.verbTo exhibit an effigy of Guy Fawkes around the 5th November.
9.verbTo make fun of, to ridicule with wit or innuendo.
10.verbTo play in a comedic manner.