The substance deviously known as the large deposits of water on the highway roads, found either during, or subsequent to a rainstorm. These deposits spew out from beneath the vehicle and from the sides of 99% of automobiles driving through them. They spray to the side, soaking cars, grass and telephone poles alike.
Bobby: Hey dude, turn the radio up, there's some Van Halen on 101.1
Colin: Sick, I love this-
Bobby: Aw shit, I just sprayed some yerba mate all over my car!