Well, I was going to have the party meet an owlbear, but a bugbear it is, now.

Well, if you want to keep the game lore intact, and surprise your veteran players, call it a "bearbug".

-"In front of you, you see a bearbug"

-"Do you mean a bugbear?"

-"Did I stutter?"

Thankfully, no one at my table knows what a bugbear is. And that's also just not the way English tends to work. A bearbug is clearly a small, hairy beetle.

Sounds like an Umber Hulk tbh