怎么回事(表示听到的话愚蠢或无聊)
what's up with that?
used to suggest that sth you have heard is a stupid idea or does not make sense
They dropped their best player. What's up with that?他们弃用了最佳队员。怎么回事?
释义来自《牛津高阶英汉双解词典》第 9 版