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Jyutping caak3 ci4 tong2
Pinyin chāi cí táng

Definitions (粵典–words.hk)
  1. 語句
    攻擊​男人​下陰​,​比喻​令​佢​斷​絕​香火​。
    (literally: to break up ancestral hall)a curse directed against men (the equivalent of "I'll cut your dick off").

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Jyutping caak3 ci4 tong2
Pinyin chāi ci2táng

Definitions (CC-CANTO)
  1. a curse used to threaten someone that they will have their penis cut off ; literally: to wreck the ancestral hall [colloquial]