Govt. agent (4)
(Other definitions for g-man that I've seen before include "FBI agent" , "Officer of the FBI in USA" .)
(Other definitions for gman that I've seen before include "Fed" , "chap from the Agency ..." .)
(Other definitions for g-man that I've seen before include "FBI agent" , "Officer of the FBI in USA" .)
(Other definitions for gman that I've seen before include "Fed" , "chap from the Agency ..." .)