a cunt's errand - A pointless task you can't avoid, like being stuck with a ba

A pointless task you can't avoid, like being stuck with a bad teacher or a broken printer.

My math teacher is the worst. That class was a cunt's errand.

The printer kept jamming. Fixing it was a cunt's errand.

I had to eat my lunch in the hallway. That was a cunt's errand.