縮頭縮腦 [缩头缩脑]

Jyutping suk1 tau4 suk1 nou5
Pinyin suō tóu suō nǎo

Definitions (CC-CANTO)
  1. coward; timid; fainthearted; recoil in fear; shrink from responsibility
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）