knock it off 停止干扰；打住；少来这一套；别再讲下去了；住手

【例句】
Peter told John to knock it off when he kept on punching him on his arm.
当约翰猛捶彼得的手臂时，彼得叫他停止胡闹。

Come on guys, knock it off. We need to be serious and figure out a strategy for the game tonight.
弟兄们，别闹了。我们需要严肃一点想出今晚游戏的一个策略。