When a hairy assed man tucks his shlong and sack between his legs he bends over so that it can be seen from behind resembling the head of a extremely hairy or "grizzly" goat.
Man this morning my wife got too close to me while we were taking a business shower, so i gave her "The grizzlygoat" to make her back up.
It's a term when somebody does something stupid -- like fucking a goat -- and they are never known for anything else but the "goat fucking" incident. Even if the person solved world peace, they would always be known as a goat fucker. It's similar to the term "jump the shark," where a tv show takes that leap into obscurity. Does everybody "fuck the goat" and ruin their reputation? No, so it's all up to the individual to make the right choice.
That guy that shot himself after being arrested for molesting a 10-year-old girl was a great firefighter and well-respected in the community. But his reputation will be tarnished and he will be known as a child molester by many. That's what happens after you "fuck the goat."
(A common high school expression slowly sprouting in Los Angeles.)
If a guy gets head from a girl, he has "shaved the goat". Thus in this expression, the girl's goat has been shaved. Although she is the one doing the action, it is her goat that has been shaved.
Did sheila do what I think she did to Mark in the car?
_Yeah, she got on her knees in front of him and he shaved the goat.