G-man

[jee-man] /ˈdʒiˌmæn/

noun, plural G-men.
1.
an agent for the FBI.
noun (pl) G-men
1.
(US, slang) an FBI agent
2.
(Irish) a political detective
n.

“FBI agent,” 1930, shortening of government man; used earlier in an Irish context (1917), but the abbreviation is perhaps the same one.

noun

A Federal Bureau of Investigations agent; feeb (late 1920s+)
[United States] Government man (FBI agent)

Read Also:

Gmap
GCOS Macro Assembler Program
GMAT
1. Trademark. Graduate Management Admissions Test. 2. Greenwich Mean Astronomical Time. 1. Graduate Management Admissions Test 2. Greenwich mean astronomical time
Gmb
abbreviation 1. Grand Master Bowman; the highest standard of archer 2. General, Municipal, and Boilermakers (trades union)

Gmbh
abbreviation (in Germany) 1. Gesellschaft mit beschränkter Haftung; a limited company
Gmc
1. . abbreviation 1. Germanic abbreviation 1. general management committee 2. General Medical Council Germanic 1. General Motors Corporation 2. giant molecular cloud