看菜吃飯，量體裁衣 [－－－饭－－体－－]

Jyutping hon3 coi3 hek3 faan6 , loeng4 tai2 coi4 ji1
Pinyin kàn cài chī fàn , liàng tǐ cái yī

Definitions (CC-CEDICT)
  1. lit. to eat depending on the dish, cut cloth according to the body (idiom)
  2. fig. to act according to actual circumstances