What is a crundle?

Answer 1

Acording to the Gman squad. "The crundle is the flap of skin between your ball-sack, and your butthole. much like a taint."

Answer 2

A crundle is a fictional creature created by the writer Terry Pratchett in his Discworld series. It is described as a small, furry ball that is capable of rolling into a tight ball and shuffling around. The crundle only appears in one book, "Moving Pictures."