stress meltdown
When a person becomes so overloaded with work in a short space of time that they become stressed and this vicious cycle continues until a meltdown.
John: I've got so much work to do this week. I feel so stressed out and I can't cope. Work is taking over my life at the moment.
Steve: It sounds like you're gonna have a stress meltdown.
Steve: It sounds like you're gonna have a stress meltdown.