Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
g-man is a noun meaning "a special law-enforcement agent of the Federal Bureau of Investigation". It carries one recorded sense.
a special law-enforcement agent of the Federal Bureau of Investigation
Definitions, synonyms and semantic relations for g-man come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.