Jeans Kid

A person who participates in track & field who forgets their track pants at home, and thus has to wear their school pants (jeans, khakis, etc) to practice. The aforementioned student typically is chastised and harassed throughout the practice as they were "dumb enough not to bring track pants to track practice"

Did hear Ryan forgot his pants?

-- No, he's rocking jeans kid?
He's totally a jeans kid. What an idiot!