A child, typically a stoner, with hair over their eyes. They generally wear skinny pants and act in ways that are not normal for their age. Stereotypically of Asian descent but can apply to anyone who fits the description. They usually hang with others like them and are oblivious to all but themselves.
Its nice and quiet on the HS bus.....then all of a sudden cooing sounds emit from kids in the middle of the bus where some 10th and 11th graders are sitting.
Frank: WTF is that!?
George: Mud Children......