词典释义：
释义
informal (of a child) misbehave
〈非正式〉（小孩）捣蛋，制造麻烦
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I hadn't had much sleep — the kids had been playing up .我没有睡多少觉，小孩子们一直在捣乱。
fail to function properly〈英，非正式〉出故障 his phone line was constantly playing up.
他的电话线老出故障。
put all one's energy into a game
〈英〉拼命投入（比赛）。