The Salty Porcupine 

While engaging in sexual activity with a woman, pull out your cock and slide your fist into her pussy. After sliding the fist in open all five fingers and thrust your hand up and down as fast as possible creating a porcupine-like atomosphere.

Joe opened up his hand inside her and made her feel the essence of the salt...

The Salty Porcupine by Annadale's finest April 23, 2005

Houston Porcupine 

when you are eating a girl out, then you stop grab a piece of artificial turf shove it up her vagina, then fuck her with a 9 iron

Man me a betsy did the Houston Porcupine last night, and now she wants to golf

Houston Porcupine by dumpymchatfuck May 20, 2011

Porcupine Effect 

When the sensation of needing to take a dump causes the hair on your arms to stiffen and stand up, resembling a porcupine.

Just got mad Porcupine Effect after Taco Bell last night!

Porcupine Effect by Mr. Lloyd Christmas September 29, 2013

crusty porcupine 

when a male homo-sapian rubs his sexual organ (the disco stick) causing seminal fluids to flow through his semenal vessels which leaves him ejaculating all over his dreadlock-like pubic hair and dosn't "clean up his mess" the semen then hardens to form a frosty and flaky-like coating over his pubic hair and creating what is known as a crusty porcupine.

joseph was watching darius his partner bend over in a too-too and then joe jerked off causing him to cum, he then fell asleep and the next morning he woke up to an early christmas suprise; the crusty porcupine.

crusty porcupine by creepy grandad from sector E May 3, 2011

Peanut Butter Porcupine 

a sexual act involving anal sex where in place of a standard lubricant you use crunchy peanut butter causing a rough spiky sensation

man, she ain't gonna be walkin' right for weeks, she let me go anal on her, but I couldn't find the lube, so I ran to the kitchen and grabbed some crunchy jiff and gave her the peanut butter porcupine

Peanut Butter Porcupine by PariahComplex May 12, 2011

spiky porcupine 

when a girl after she is done sucking your dick spits your cum back into your pubes and spikes it up making you into a spiky porcupine

damn that girl meanest spiky porcupine

spiky porcupine by rico suave and ted calfelz November 21, 2009

Porcupine Tree 

An experimental Faggy Hippie Rock band which was literally created by Musician Steven Wilson who recorded his own drums, guitar, bass, vocals, and synth effects in the early 90's.

For the most part they play unique keyboard/acoustic ballads but in their recent albums have taken a more metal approach to their music. Their best CD however is of course the Metal/Synth experiment called 'Deadwing'.

Porcupine Tree? They are bad ass.....but Wilson won't tell anybody what the hell their name means.

Porcupine Tree by Jeffery Lebowski July 20, 2006