the difference in colour between the skin and the tip of the penis. higher percentage, more contrast.
person #1: My tip is dark pink, almost red, but my
skin is so pale!
person #2: Bro, your groingle percentage has got to be 85 or above!
skin is so pale!
person #2: Bro, your groingle percentage has got to be 85 or above!
by chompgiraffe June 29, 2024
Get the groingle percentage mug.