Recently I watched a video and here is one of the line:
The grizzly image has since been immortalized as shorthand slang for single-minded cult-like thinking.
When I searched the meaning of "grizzly" on the internet, I saw only the result "grizzly bear". It seems to me that "grizzly" has no meaning standing on its own. Is it so? Below is the video. The line is at around 0:59.