(v) sexual act of when you have sex with a girl while you have to shit. and as you ejaculate, crap and throw it in her face. may cause intense orgasms.
Me: my wife was totally shitfaced last night.
friend: really off what?
Me: A pimpin chimp!
the female puts either her right/left shoulder under the man's junk. Then they wrap their hand around the penis and basically "fist pump it like a champ".
Optional: you can start a dice roll on it and then work your way up to fist.