Definition
Used to inquire about someone's current actions or secret plans.
你想做什么？（询问对方的真正目的）
When I saw him sneaking around the office and rummaging through things, I asked, 'What's your game?'
当我看到他在办公室里鬼鬼祟祟地翻找东西时，我问道：『你在搞什么鬼？』
She looked very suspicious, so I asked her, 'What's your game, exactly?'
她看起来非常可疑，所以我问她：『你到底在玩什么把戏？』
When I saw them secretly digging a hole in the backyard, I asked, 'What's your game?'
当我看到他们在后院偷偷挖洞时，我问道：『你们在搞什么鬼？』