to carry to gun; to be armed; to work in the police force [colloquial]
Definitions (粵典–words.hk)
動詞、俚語
執行警務或者保安職責，合法持械 to be in police or security-related occupations and to carry guns
佢而家做緊輔警，日頭讀書，夜晚佗鐵。
佢而家做紧辅警，日头读书，夜晚佗铁。
keoi5 ji4 gaa1 zou6 gan2 fu6 ging2, jat6 tau2 duk6 syu1, je6 maan5 to4 tit3. He has joined the auxiliary police force–student by day and police at night.