發誓當食生菜 (faat3 sai6 dong1 sik6 saang1 coi3) — not being serious when doing one's vow or pledge for sth in Cantonese
faat˗₃發saiˍ₆誓dongˉ¹當sikˍ₆食saangˉ¹生coi˗₃菜简 发誓当食生菜
Mandarin Pinyin: fa1 shi4 dang1 shi2 sheng1 cai4
Meaning of 發誓當食生菜
nounnot being serious when doing one's vow or pledge for sth