Definition from Wiktionary, the free dictionary
mudflap (plural mudflaps)
- A rectangular flap mounted near the wheel of a truck to prevent mud from being thrown up onto the vehicle.
2007 February 1, Cathy Horyn, “The Good, the Bad, the Amusing”, New York Times:
- Yohji Yamamoto showed Alpine knits with cropped black trousers, fresh-looking coats in vanilla-colored wool, and knits and other wool colors embellished with the sort of female pinup images you see on old gas-station calendars or on the mudflaps of an 18-wheeler.