笑掉大牙 [－－－－]

Jyutping siu3 diu6 daai6 ngaa4
Pinyin xiào diào dà yá

Definitions (CC-CEDICT)
  1. to laugh one's head off
  2. ridiculous
  3. jaw-dropping
Definitions (Wiktionary)
  1. phrase, idiomatic
    to laugh one's head off; ridiculous and embarrassing