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.
by yourjmother March 15, 2010

by Jim Bob Cleetus II November 19, 2007

a sexual act similar to Snozzberries. The remnants left on a man's beard after going down on a woman who is having her period.
"Man, she is such a bitch today- she must be having her period."
"Yeah but I'm sure you enjoyed going down on her."
"What! How did you know?"
"Your sporting a Grizzly Adams bro."
"Yeah but I'm sure you enjoyed going down on her."
"What! How did you know?"
"Your sporting a Grizzly Adams bro."
by FMA.memories.PSU September 26, 2011

The Act of shoving ones fist into their unwiped anus and smearing the defecate across anothers face until face is completely covered in fecal matter.
by ocsoB August 31, 2010

An old man who dates woman considerabley younger than him. Usually wealthy, they often attract models and gold diggers. The male equivalant of a cougar.
Guy: "Did you hear Hugh Hefner has already moved in three new girlfriends?"
Guy 2: "Yeah man, what a grizzly bear."
Guy 2: "Yeah man, what a grizzly bear."
by jessemuthafu_kinbryan123 July 12, 2009

when i first met my flat mates i was wearing nothing but a devet and was covered in scratches from a grizzly bear
by lazyawol February 18, 2007

by Walter Mitty June 28, 2010
