trucker bomb
n.— «What should you do if you are driving on the highway and you really need to release some excess fluids? If you are one of many truckers, you grab the nearest jug. And then if you are a rude trucker, you toss it out the window. The result is so-called “trucker bombs” that litter almost every highway throughout the nation.» —“Truckers ‘bomb away’” by Aaron Wiens in Northern Illinois University Northern Star (DeKalb, Illinois) Aug. 26, 2005. (source: Double-Tongued Dictionary)