Shitwack, or shitwhack is the Canadian equivalent of shitload. Less than a fuckton, more than an assload, the Canadian shitwack is equal to 1.2 American shitloads
"We got a shitwack of snow last night"
"We need to buy a shitwack of beer for the party"
"There were three metric fucktons of dank here last night, where'd it all go? There's a whole shitwack missing!"