G-man(redirected from a G man)
slang An FBI agent. The "G" is thought to have originally been an abbreviation for "government." Come on, that guy definitely looks like a G-man, and if a G-man is tailing us, then they must know about our Ponzi scheme!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a government investigative agent; an FBI agent. The G-men busted in and started shooting.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.