Jazzylean (n.) A teenage boy, typically between the ages 13 and 16, with a slim physique, locks of golden blond hair, and an apparent summer tan. Unbeknownst to the casual observer, the subject is discretely up to no good at all times and should be closely surveyed for suspicious activity to determine whether or not the subject is a jazzylean.
Girl 1: "I got asked to prom by Jacob"
Girl 2: "ohh that jazzylean... it might be fun but you should be careful"
That young blond child looks like he will be a jazzylean when he gets older.