1. G-Man (Shortening of "Government-Man") is a word used to describe a special agent of the FBI or other such law enforcement agency.
2. The famous mysterious character from the game "Half-Life" who was sent in to clean up the incident. He appears throughout the game, supervising your progress.
1. The drug bust operation was put in the hands of an FBI g-man.
2. The g-man was one of Half-Life's most memorable characters.