a bad time
1. A time that is inconvenient or inopportune. I'm afraid you've called at a bad time. I'm already on my way out the door.
2. A situation that is challenging and/or not fun or enjoyable. If you try to do too much after surgery, you're going to have a bad time. We had a really bad time on our date because we simply don't have anything in common.
bad time
see under have a good time.