1. A person that joined the marines for the wrong reasons.

2. Someone that enlists to have sex with others in the military.

3. A Canadian that will fuck his way through for full U.S. citizenship. Usually has boners for Superman.

when a marine realizes he was punked by the recruiter and signed his or her soul over to an unforgiving bull shit gang whose entire existance survives only by the 500 kilo ton nuclear destruction of the motivation, hopes and dreams of every single junior enlisted until they reach a psychological threshold of "brainwashed"

A machine in the sack. Inexhaustible, willing to take on most any challenge, and unafraid of sweat, pain, and possibly even blood & bruises.