A person, usually a man who doesn't care in who he puts his dick in. He will have sex with anyone: the fat, the jews and even other men.
Person1: dude, did you know Morty had sex with that Jewish, acne ridden cow?
Person2: wow, what a shibby shagger, I heard he even had sex with Shane!
Another word to be used in place of marijuana.
Can i get a nickelbag of that shibby shaba, dude?