foursome/ˈfɔ:səm; `fɔrsəm/ n1 four people joining together to play a game, esp golf 四人参加的游戏（尤指高尔夫球）.2 two couples undertaking a leisure activity together 两对男女一同参加的娱乐活动 Let's make (up) a foursome and go out to a restaurant. 咱们四个人（两对男女）一起下饭馆吧.
牛津英汉双解词典