䛚願當食生菜 [－愿当－－－]

Jyutping sai6 jyun6 dong3 sik6 saang1 coi3
Pinyin lüè yuàn dāng shí shēng cài

Definitions (CC-CANTO)
  1. to make a vow or a pledge casually without really thinking about following through with it [colloquial]