grizzly bear
Definition
A large subspecies of brown bear (Ursus arctos horribilis) native to western North America, distinguished by its massive size, prominent shoulder hump, long claws, and fur with grayish or white tips giving a 'grizzled' appearance.
Informally, something extremely challenging, intimidating, or ferocious, as in 'That boss is a real grizzly bear.'
Examples
The grizzly bear eyed the fisherman's catch with the kind of hunger that turns picnics into bad life choices.
Hiking in Alaska, she mistook a grizzly bear for a large, grumpy dog—until it stood up on its hind legs.
Unlike Goldilocks' porridge thief, this grizzly bear doesn't just sample; it claims the whole cabin.
The grizzly bear's fishing technique is basically 'swipe first, ask questions with claws later.'