know it all

A know it all is a person, that has to be right about everything, interupts, and is just plain rude. Some people can del with people like this but somtimes the can just get anooying. For example  know it all's , now matter how complicated  question is and they dont have the right answer, they make sure their voice is heard that they are right when they are not. Another example about them is they interupt alot , when someone is talking  a subject of some sort somtimes they will just interupt that person in the middle of the conversation and say what they think is right. Finall they can be just straight out rude , they come to believe their better than everyone and that their on top of the world  because their super smart. this is how know it all's usually act as if they are superior to others.