A decal depicting an impish adolescent with a mischievous grin displayed on the rear window of a pickup truck. Typically, he is urinating on a Ford logo (if the owner has a Chevy) or a Chevy logo (if the owner has a Ford). Sometimes he is urinating on Osama bin Laden. Other times, he is simply urinating; perhaps with a view toward displaying a general disregard for social norms. These decals are popular in the Redneck community.
We must be in Tennessee by now. Urine boy is everywhere.