a 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.
a heck of a —used for emphasis in various statements or exclamations. informal
Of dialect origin, heck is a late 19th-century euphemism for hell .
1989 Guardian It is not entirely true to say everyone who is anyone has been coached there, but a heck of a lot have.