Scared of the Big Black

Listen up, nimrod! The Riddler asks if you're scared of "the big black," but he doesn't say what "the big black" is. The person gets scared, not of "the big black" itself, but of the Riddler's creepy implications since he won't clarify. It's funny because the Riddler is being sus. I bet you are scared of a lot of things, aren't you? Based bear out!