一皇多后 [－－－－]

Jyutping jat1 wong4 do1 hau6
Pinyin yī huáng duō hòu

Definitions (CC-CANTO)
  1. group sex with one man and many women [written and colloquial]
Definitions (粵典–words.hk)
  1. 語句、俚語
    一個​男性​同時​同多個​女性​發​生性​行為
    one man to have sex with multiple women (at the same time); literally: one king multiple queens