for keeps
要来要去的；假意的；不认真的
口语·表达永久拥有或严肃对待
英文释义
to keep or retain indefinitely, to possess permanently
例句
This time we're playing for keeps, no more practice rounds.
典故来源
源自儿童游戏，尤其是弹珠游戏，赢家可永久保留输家的弹珠。