Be/get beyond a joke
Definition 1 of 1
Pro Tip 1/3Frustration Expression
Used to express that something has become frustrating or problematic, not just a minor annoyance. 
The Wi-Fi breakdown has gotten beyond a joke; I've got urgent emails to send!
Pro Tip 2/3Focus on Severity
Emphasizes that a situation has escalated to a level of high severity or seriousness. 
Their running late has become beyond a joke; we're missing all our appointments!
Pro Tip 3/3Colloquial Usage
Common in spoken English and casual settings. Not suited for formal writing or speeches. 
His prank calls are getting beyond a joke; someone could get hurt.