- an agent for the FBI.
Origin of G-man
Examples from the Web for g-man
Contemporary Examples of g-man
Christian Bale becomes Melvin Purvis, the first famous G-man who tracks the gangsters down.The Oscar Race Begins
June 30, 2009
- US slang an FBI agent
- Irish a political detective
Word Origin and History for g-man
"FBI agent," 1930, shortening of government man; used earlier in an Irish context (1917), but the abbreviation is perhaps the same one.