實錘 [实锤]

Jyutping sat6 ceoi4
Pinyin shí chuí

Definitions (Wiktionary)
  1. noun, Mainland-China, neologism, slang
    smoking gun; ironclad evidence; concrete proof

實錘 [实锤]

Jyutping
Pinyin shí chuí

Definitions (CC-CEDICT)
  1. (neologism c. 2014) (slang) solid proof
  2. irrefutable evidence