what's your game? idiom UK informal
你在玩什么把戏？你在搞什么名堂？
something you ask when you want to know what someone is doing or secretly planning to do
The porter saw me climbing over the wall and shouted "Hey you, what's your game?" 守门人看到我翻墙，大声叫道：“哎，你在搞什么名堂？”