凸槌 [－－]

Jyutping dat6 ceoi4
Pinyin tū chuí

Definitions (CC-CEDICT)
  1. (slang) (Tw) to mess up
  2. to screw up
Definitions (Wiktionary)
  1. verb, Taiwanese-Mandarin
    to go off the rails; to screw up
  2. verb, Taiwanese-Mandarin
    to make a fool of oneself