Who said "Death isn't the worst thing that can happen to you."?

This quote is attributed to Kenny McCormick.

Death isn't the worst thing that can happen to you. - Kenny McCormick

"Death isn't the worst thing that can happen to you."

Kenny McCormick Death

"Mmph mmph mrmph!"

"I'm not fat, I'm just big boned"

"Dude, we're in third grade"

"This is so cool"

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."