the "G-Men", but Moira MacTaggart states that they are something different, and decides to name the team "X-Men". Charles finds the name amusing and keeps it. See also G.I. FBI portrayal in media Noun definition of "fed" Society of Former Special Agents of the Federal Bureau of Investigation Men in Black G-Man (Half-Life) References Slang Federal Bureau of Investigation 1920s neologisms 1930s slang 1940s slang 1950s slang American slang South African slang Dublin Metropolitan Police