A shirt that changes color with changes in body heat. While this would seem a good reason for the overweight and overly-sweaty to avoid wearing them, these were precisely the only individuals who did so at my high school. See also 80's.
An in-your-face rebuke to all the haters who said that denim was only meant for pants. See also Denim.
Because life is hard enough as it is without having to also carry your ice-cold case of beer and gallon of potato salad. See also Lazy.