腦子進水 [脑－进－]

Jyutping nou5 zi2 zeon3 seoi2
Pinyin nǎo zi jìn shuǐ

Definitions (CC-CEDICT)
  1. to have lost one's mind
  2. crazy
  3. soft in the head
Definitions (Wiktionary)
  1. verb, derogatory, idiomatic
    to be crazy or stupid; to have lost one's mind
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    白痴，你脑子进水了？
    白痴，你腦子進水了？
    bái chī ， nǐ nǎo zi jìn shuǐ le ？
    • Idiot... You got water in your brain or something?