The act of ejaculating into another mans foreskin, whilst penile coupling., i.e. docking. Not to be confused with chocolate willipie.
I made a willipie with Chad last night.
A variation of a willipie. When you're having anal sex and you thrust your penis into your partners ass so hard you lodge a turd deep into your foreskin.
I was driving Sally down the Hershey highway and she gave me a chocolate willipie. That girl needs to eat more fiber.