the sexual act involving a prosthetic leg and melted carmel. While boning the amputee, remove the prosthesis, ram it into your partners ass and pour carmel on their head. One variation is the "Pirate's Carmel Apple." In this permutation, immediately after turning your partner into a carmel apple you shout "Harrrrrr!!!!" like a pirate in honor of your partner's peg leg.
I was boning Heather Mills when I pulled off her fake leg, rammed it into her ass, and poured carmel over her head. She wasn't too keen on being a Carmel Apple.