A wall kid is a male or female high school celebrity that stands by a wall (but in reality it is a railing). They drive jeeps, throw a pigskin a quarter mile, drink enormous amounts of liquor, and have a better life than you. They cannot survive without their friends, they run the school, they do not care about your opinion, and they only wear sports attire. These exclusive people will not move for you in the hallway and have the front row reserved for them at sporting events. You will spot a male wall being sporting mid calf stockings and a "sick flow" hairstyle. A female wall child is a girl that is a future model already planning plastic surgery. In a nutshell you will never be a wall kid, if you think you are a wall kid go take a good long look at yourself in the mirror.
Wall Kid: "Yo bro! How come you don't stand by the wall?"
Normal Kid: "Because I am not a wall kid and I have common sense."
Normal Kid: "Hey, are you a wall kid?"
Wall Kid: *no response*