piss-littering

The act of throwing plastic jugs of urine out of a vehicle window and into the roadside ditch or weeds / bushes.
Piss-littering is usually performed by long-haul truckers as a matter of convenience.

It's the problem that's threatening to turn Oregon into a 97,052-square-mile Honey Bucket: roadside urine dumping. Today, to fight the epidemic of plastic jugs of urine being tossed from cars onto the roadside, the Oregon House Transportation Committee endorsed House Bill 3530, which would make improper disposal of human waste punishable by fines of up to $2,500. The Seattle P-I reports that the bill would target all urine-tossing motorists, but would specify harsher penalties for commercial drivers; in addition to pricey fines, pro truckers found guilty of piss-littering could face license suspension. State officials blame the boom in abandoned jugs on increased competition in the trucking industry, which deters truckers from stopping for pee breaks, but Oregon trucking associations are crying foul and playing innocent. "I don't think there's any evidence it's the trucking industry," said trucker lobbyist Robert Russell, adding, "Whoever's doing it shouldn't be doing it." Bill 3530 now goes to the Oregon Senate Transportation Committee.