木腦殼 [－脑壳]

Jyutping muk6 nou5 hok3
Pinyin mù nǎo ké

Definitions (Wiktionary)
  1. noun, Xiang
    wooden image; wooden puppet
    (syn.) 柴尪仔, 木偶
  2. noun, Xiang, figuratively
    close-minded person