hell of a time

1. Describing something (often a task or chore) that is, was, or will be very difficult or unpleasant. I always have a hell of a time trying to get my kids ready for school in the morning. They are just too rambunctious for me at that hour. I had a hell of a time trying to change the flat tire. The lug nuts didn't want to budge. I'm having a hell of a time getting anyone to take me seriously around here!

2. Describing something that is, was, or will be very fun or exciting. We had one hell of a time at that party last night. It was so much fun. That singer puts on a great show—we had a hell of a time when we saw her last summer. I thought I'd have a hell of a time with my friends—that is, until my ex-boyfriend walked into the club.