G-Man (slang) G-Man (slang) G-Man (short for "Government Man") is an American slang term for special agents of the United States Government. It is specifically used as a term for a Federal Bureau of Investigation (FBI) agent. "G-Man" is also a term used for members of G Division, essentially a British anti-rebel police unit operating out of Dublin Castle prior to Irish Independence in 1922. Colonel Ned Broy uses the term in his official testimony for the Irish Army's Bureau of Military History in their archive of the Easter Rising (1916) and the Irish War of Independence (1919-1921). According to the "Merriam-Webster
G-Man (Half-Life) accentuated low-key moroseness to his tone, sometimes placing unusual stress on syllables, stressing the wrong parts of words, making unneeded pauses, and awkwardly changing the pitch of his voice, sometimes in the middle of a word. In the end of "Half-Life 2", the G-Man emphasizes the word "time" repeatedly as well, most likely referring to the fact that moments before, he seemingly stopped time. It is common for the G-Man to elongate "S" sounds ("Limitle"ssss" potential"). His odd manner of speaking, bordering on the cryptic, along with his appearance, alludes to the behavior of the "men in black" in various