數碟底 [数－－]

Jyutping sou2 dip6 dai2
Pinyin shù dié dǐ

Definitions (CC-CANTO)
  1. to expose the secrets of others
Definitions (粵典–words.hk)
  1. 動詞、俚語
    比喻​爆人​私隱
    to expose the secrets of others; literally: to count the bottom of plates