Shitty Grizzly
Is when you go bear hunting and you sneak up on a sleeping bear, hop on its back while you're naked. You then proceed to wake up the bear by sticking your rifle far up its asshole. Then while the bear is trying to get you off of it you squeeze out a quick terd and rub it all over the bear's face and run away.
I went huntin' this weekend man, I saw a good lookin mother bear, so I gave her a Shitty Grizzly before I killed her.