揸住雞毛當令箭 [－－鸡－当－－]

Jyutping zaa1 zyu6 gai1 mou4 dong3 ling6 zin3
Pinyin zhā zhù jī máo dāng lìng jiàn

Definitions (粵典–words.hk)
  1. 語句
    令箭​係​古時​軍​中主將​用​嚟​發布​命令​嘅​箭​。​成句​比喻​以​假作​真​，​玩弄​權術​。
    to be domineering without any real or sufficient claim to authority

揸住雞毛當令箭 [－－鸡－当－－]

Jyutping zaa1 zyu6 gai1 mou4 dong1 ling6 zin3
Pinyin zhā zhù jī máo dāng lìng jiàn

Definitions (CC-CANTO)
  1. to overrate oneself; to overestimate one's power or ability; pretend to have authority over something which one don't have (slang)