Easy, control your frame. Think of any AMOG as a dissing contest. You won't look bad as long as you control your frame.
You can either redirect it to him by saying "I don't remember, jumping on you". Or deflect it by saying "And it works.

"
Or you can just give him an emotionless glare and then say "So... anyways..." and ignore him.
OR call him right out and say "Why are you dissing me?"
These people are your friends you shouldn't let them AMOG you and if they do then show them who's boss. Always redirect it back at them or away. Of course this will make both of you look bad because he is your friends. You can diss him and laugh but don't say you're kidding because they are real dicks and you don't kid.