douche leash
The leashes worn on the sunglasses of a frat boy or douche bag. Commonly complemented by above-the-knee plaid shorts, a polo shirt that is too small, and sandals or boat shoes - frat gear. The doucheness is compounded when worn at night.
It's 10 o'clock at night and that frat boy is sporting sunglasses with a neon green douche leash.