tight pants kid
Someone who is wearing pants so tight it is obnoxious. Age is irrelevant.
"Hey Fred, look at that tight pants kid on the bench with his cell phone out! How much you want to bet he isn't talking to or texting anyone?"
"None, but you're probably right Kirk. Those pants are the opposite of Kara."
"None, but you're probably right Kirk. Those pants are the opposite of Kara."