whack

noun, colloquial, a portion, share, allowance; esp. a full share, a large portion or amount (“whack, n.” OED)

“She found a whole whack of money.”

“I was fifteen, and there was a whole whack of us in that age group.”

“Well it was a whack of us, and the reverend at the United Church was really good about keeping all the kids out of trouble.”

“A whole set of The Centennaire…  Wow. Every last copy? ‘Cause I’ve got a whack of them…”