hard as hail
It is the same thing as hard as hell but correct.
HOLY SHIT DUDE I AM 19 AND I JUST FOUND OUT IT'S HARD AS HAIL NOT HARD AS HELL END ME.
Hard as hail
It’s not hard as hell. Hell isnt hard. Hail is. Hell is hot. Hence the phrase “hot as hell”
That test was hard as hail.