What you say to get a laugh after someone mentions Asphalt (The joke is in the fact that "Asphalt" sounds like "Ass Fault")
A tractor-trailer driver is flirting with a female dump truck driver. "I'm helping repair the roads today," she says, "I gotta pick up some asphalt later on." All of a sudden, the tractor-trailer driver says "Whose fault?". It takes the dump truck driver a minute to get the joke, and when she finally does, she busts up laughing!
by Stupidly Sophisticated May 11, 2018