陰盛陽衰 [阴－阳－]

Jyutping jam1 sing6 joeng4 seoi1
Pinyin yīn shèng yáng shuāi

Definitions (CC-CANTO)
  1. yang deficiency due to an excess of yin; situation where female outnumber males
Definitions (Wiktionary)
  1. phrase, idiomatic
    flourishing of yin and decline of yang; stronger women and feebler men; femininity overpowering masculinity; more women than men
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）