Definition of grizzlies:
(n) :
A grizzly bear.
(adj) :
Grey-haired, greyish.
(adj) :
Crying or whingeing in a bad-tempered or irritable way.
(n) :
(Canada, US, dialect, mining) A grating used to sieve stones by size, so as to keep stones out of the sluices (in hydraulic mining) or to control stone size in the feed to the ore crusher.
(adj) :
Misspelling of grisly. [Horrifyingly repellent; gruesome, terrifying.]