問客殺雞 [问－杀鸡]

Jyutping man6 haak3 saat3 gai1
Pinyin wèn kè shā jī

Definitions (CC-CEDICT)
  1. lit. asking guests whether or not to butcher a chicken for them (idiom)
  2. fig. hypocritical show of affection (or hospitality)