It's all about how you respond to it. If someone pump fakes a punch at you, and you flinch, you're saying you could hurt me. If someone attacks your character and you defend it, you're saying your character need shielding. Look at the AMOG deep into the eye, make sure you have his attention...then laugh at his insecurity (the need to insult/intimidate people) and move on. It's easier the more you do it and the more you see it backfire on them. Think about how many times a guy has gotten a black eye, and then gotten laid that night. AMOGs don't target people of low value, they target people of higher value. If someone of high value is trying to get under your skin, they are saying you are of even higher value. Especially if this guy has already been around your set and the girls have noticed he tries to impress everyone...Like AMOGs typically do. AMOGs are trying to get YOU to throw the first punch, by getting under your skin. People notice when someone is trying to get under another person's skin, and it's even more apparent when the person getting attacked moves on fast and doesn't reciprocate.

The more you ignore him, the more he will try to bring you down and the bigger a hole he will dig himself. Every time he brings it further, laugh more. It's not easy, it will take mental strength, but it gets easier and easier as he notices his value is dropping and he gets more and more desperate.