A Steven can come in many different forms with the most popular being the one of the human denomination. It is usually in a meat format with a small bone structure better known as, skinny runt. A Steven will sometimes try to make jokes about certain subjects which would then fail resulting in everyone else calling it, a bastard.
The most popular known species of Steven to the human eye is one with a tiny penis, almost vagina like. They occur all over the world and are to be avoided at all costs due to the terrible smell of their breath and ability to put your penis in your mouth in a matter of seconds, without you realizing.
"Hey look there is a Steven
"Shit man, don't go near that hideous creature"