分雌雄

fēncíxióng ㄈㄣ ㄘˊ ㄒㄩㄥˊ

    • to decide the winner between rivals by a contest

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
separate female and male
Meaning
To settle which of two rivals is better by a contest. It is usually used of a showdown, as in "to decide who is the winner."

Sources