Religious tracts, coupons, and "special offers" placed between one's windshield wiper and windshield. These are either balled up by the vehicle's owner and thrown on the ground, or are not noticed until the vehicle is in motion, whereupon they eventually blow off on the highway.
If you work at a mall, or any other place with a high concentration of cars in the parking lot, you are bound to remove litterature 3-5 times a week.
euphemism for using the toilet, especially "sitting down."
Boss: "Dave, where'd you go after you punched in?"
Dave: "Sorry, boss, I had to stop by the Rapid Weight Loss Center."