A participant (fighter) in a boxing match.
A letterboxer.
A breed of stocky, medium-sized, short-haired dog with a square-jawed muzzle.
A type of internal combustion engine in which cylinders are arranged in two banks on either side of a single crankshaft.
The person running a game of two-up.
One who packs boxes.
A soldier (especially of the United States military).