play away from home
在自己的领域之外或陌生的环境中进行活动或比赛
口语·指婚外情
英文释义
to have a romantic or sexual relationship with someone other than one's partner while away from home
例句
He was caught playing away from home while on a business trip.
典故来源
源自体育术语，指在客场进行比赛，后引申为在异地或陌生环境中进行不忠行为。