What do you call a rabbit with a big ass?
A BUNny.
Big Butt Rabbit
Explanation
Explain Bear
Hey, listen up, buttercup. This joke is all about *wordplay*. See, "bunny" sounds like "bun," which is slang for...well, a big ol' butt. So, it's funny 'cause it's unexpected and kinda cheeky. You probably have a huge caboose yourself so you probably already knew this.