heck of a

heck of a

1. Quite good or impressive. That was one heck of a party you threw for Kelly. Everyone said they had such a great time. He's a heck of a ballplayer. I wouldn't be surprised if he made it to the pros someday.
2. Very difficult. I had a heck of a time trying to change the flat tire. The lug nuts didn't want to budge.
See also: heck, of