The act of taking a live porcupine (also called the quill pig) and throwing it at an unsuspecting passerby. It is frequently used as a method of revenge on someone who has recently committed a grievousoffense.
when you fuck on a bed of nails doggy style (usually a blonde, if not a red head). a full porcupine is when u shave her legs after sex (if her legs are not shaved it is only 1/2 a porcupine)