[speakeasy]

First thing is to avoid being around people who act stupid in the first place. But if you have no choice, either you got to punk him back verbally or physically. Some people are just not good at ragging. I'm not. Ragging on people is a talent. I noticed that in high school. Some guys can say anything no matter how stupid and everybody is laughing because of the way they said it. It's not everybody's game though. If not, I'd say threaten to beat his ass next time he starts talking shit. And do it right in front of everyone. Or better yet, give no warning. Just sock his ass in the mouth. That'll shut him up for good. If you're not a fighter either, use a few techniques from here: http://www.youtube.com/watch?v=D3K-mrlYG7Y