The act of jumping hedges in backyard's of a run of terraced houses. Tresspassing through back gardens via "hopping Hedges" Originated in 1940's England
Rampant sex on a sofa with the man on top of the lady, who is curled up in a ball, on her back, her knees at her breasts, head pushed forward and rammed into the corner of said sofa.
Peter and Penelope hadn't met up in several weeks. As soon as gorgeousPenelope lay on the sofa Peter entered her and within minutes they were passionately hedgehogging.
To drink a generous amount of alcohol, resulting in ending the night with you curled up in a ball (also known as the fetal position), similar to what a hedgehog does while resting and/or startled.
the feeling when you need to poo and you can feel the poo on the edge of your bum hole going in and out like a cute little hedgehog going in and out of a hole