If one of your best friends is a pushover and always try to stay on top, what's a good way to deflate his superiority complex?

This guy I know constantly likes to act as if he always on top of everything. He is single minded, makes stupid jokes out of any situation, and only wants to teach or give a lesson in a demeaning way but doesn’t seem to possess any empathy. I like the guy, and we get along, but I’m getting tired of the jokes.. and his way of dealing with relationships. when he is talking to his girlfriend for instance, he’s a completely different person. and when he’s with guys, he’s a over sarcastic, brat, who will call anyone gay, and would make fun of them, knowing that we know that he is joking. I can’t make sense of him anymore, so I want to know what you think.