[ jee-man ]
/ ˈdʒiˌmæn /
noun, plural G-men.
an agent for the FBI.
Origin of G-man
First recorded in 1920–25; probably representing Government man
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for g-man
noun plural G-men
US slang an FBI agent
Irish a political detective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012