濕水棉花 [湿－－－]

Jyutping sap1 seoi2 min4 faa1
Pinyin shī shuǐ mián hua

Definitions (粵典–words.hk)
  1. 語句
    歇後語​；​即​係​「​冇​得彈​」
    beyond reproach; impeccable; very good; the former half of a sandwich pun literally meaning "wet cotton"