beyond a joke idiom
mainly UK超出开玩笑的限度;令人极为难堪（或恼火）
If something is beyond a joke, it has stopped being funny and is now a serious matter.
I used to think he was funny, but his behaviour has now gone way beyond a joke. 我曾经以为他滑稽有趣，但他现在的行为已不是开玩笑的问题了。