How do you shut peoples face without being offenseive?

"How do you shut peoples faces without being offensive"... Not sure what you mean, but I'm thinking you wanna know how basically how to tell someone to shut up without being a jerk about it. In my opinion, the best way to do this is just remove yourself from the situation. If you can't leave or walk away, then just politely tell the person that you don't want to have this conversation right now, or say that you respectfully disagree, and tell them why. Some people are very aggressive with conversation and they dominate the conversation and won't let you disagree or share your opinion, or they tell you that you are wrong (even when you're right, sometimes,) in which case it is best to just make up an excuse such as remembering that you have other plans and you just realized you are late and must leave right away, or pretend to check your phone while actually just putting it on silent and then pull it back out a minute later and say you just got an urgent text and must leave because someone needs your help with something.

I'm not sure if this was the answer you were looking for, but I hope it helped in some way.