Poser, follower, a charlatan of sorts. One who copies or immitates all or most of the aspects dealing with their idol. They may wish to have certain clothing, skills, vocabulary, etc., of their idols instead of their own. Most likely a wannabe is lacking in self confidence and is looking for guidance.

the act of texting people while you are pooping

Someone who wants to be what they are not.

1. Someone trying too hard to fit in with a specific crowd of peepz. They usually change the way they act, dress and or talk.

2. A faker, a poser

(A.) Someone who wants to be something else and fit in a crowd, someone who tries to act like someone they want to be even though it's obvious that they're just a stupid wannabe.

Someone classed as a wannabe is generally considered a bad person simply because they want to be something that they aren't yet. Something most people cannot seem to understand is that everyone is a wannabe at some point in their life. You make fun of that "barbie wannabe" over there thinks she has to have big boobs or be really skinny to be around the type of people she likes, she will learn to make it her own as time goes on. You make fun of that girl covered in makeup and stuck in class faking a hangover because she thinks it will make her popular, she will learn either by friends, family, or time that it only makes her look... significantly unintelligent. I'm sure at one point in your life you've tried hard to be someone or something when you weren't quite there yet, right?

a person who acts like someone that they are not. also see moron