An illicit boxing match; see Wikipedia:Battle Royal (boxing).
A device that releases smoke intended to distract bees (also more specifically called a bee smoker).
An apparatus for smoking food, or a person who smokes food.
(Britain, Cambridge University slang) A social event featuring sketches, songs, etc., whether or not smoking is carried out.
(slang) A two-stroke engine or by extension the vehicle itself. Especially when talking about a motorcycle, as opposed to a four-stroke motorcycle (stroker).