group sex

uncountable

The practice of having sex with multiple partners at the same time.

Japanese Meaning

複数のパートナーと同時に性交する行為 / 集団性行為

She decided to be honest about her past experience with group sex when their relationship became serious.

彼女は関係が真剣になったときに、過去に複数の相手と同時に性行為をした経験について正直に話すことにした。

Sense（1）

The practice of having sex with multiple partners at the same time.