Who is white, hairy, and rusty in the tree?
It's Rambo Rabbit with a big gun that was.
Rambo Rabbit
Explanation
Explain Bear
Alright listen up, buttercup. So, there's this rabbit, right? But it ain't just any rabbit, it's Rambo Rabbit. Get it? "Rambo Rabbit with a big gun that WAS." It sounds like "was" as in "used to be," but it also sounds like "wasp." You probably don't get it because you think mayonnaise is spicy.