出銃 [－铳]

Jyutping ceot1 cung1
Pinyin chū chòng

Definitions (粵典–words.hk)
  1. 動詞、術語
    麻雀​術語​，​打出​咗​人​哋​叫​緊​糊​嗰​隻​牌​，​令​佢​可以​食糊
    (mahjong terminology) to discard a tile that others are calling
  2. 參看
    出沖

出銃 [－铳]

Jyutping ceot1 cung3
Pinyin chū chòng

Definitions (CC-CANTO)
  1. to discard a tile that causes opponent to win immediately (mahjong)/to show one's weakness to your enemy
Definitions (Wiktionary)
  1. verb, Cantonese
    to discard a tile that another player uses to complete their hand to win
    (syn.) 放炮