Were a normal person that you think is a nice guy turn in to an ass hole and tries to be the best at everything. They may also ditch you to be with other people that don't even know him.
first person: Dude he was alright last week and now he just tried to beat me at all the things I'm better then him at!!! WTF!!!
Second person: Yeah he done the same to me! He's pulling a J.Baxter on us!!!
First person: o well i didn't like him much anyway.