Any packaged conglomeration of trash used as a weapon against a motorist. A trashogram may have insults written on it. It is generally thrown at or into the vehicle of an erratic or dangerous driver.
"that ignorant squack just pulled in front of the semi, and cramped on the binders!!"
People who dig around for information about other people they don't know . They gather and search info so each contact thinks they know the person they are talking about.
Look out for those trashdiggers they could fool your own mom.