[be|go|get] beyond a joke

to start becoming a source of trouble or worry

The origin of the idiom "be beyond a joke" is unclear, as it has been in use for a considerable period. It is likely that the phrase developed over time through the natural evolution of language and idiomatic usage. This phrase is used to convey that the situation has reached a point where it is no longer funny or tolerable and has become a source of frustration, annoyance, or distress.

The constant pranks from my coworkers were funny at first, but it has now gone beyond a joke.It's affecting my productivity and creating a hostile work environment.
The noise from the construction site next door was tolerable for a while, but now it's getting beyond a joke.I can't concentrate or get any sleep.
The delays in the public transportation system have been going on for months, and it's getting beyond a joke.Commuters are constantly late and frustrated.
His constant teasing and mocking have reached the point of being beyond a joke.It's starting to hurt people's feelings and causing unnecessary tension.
The recurring technical issues with the software are beyond a joke.It's causing significant disruptions to our business operations.