mudguard — English Dictionary

Noun

1. A cover over the wheels of a vehicle, or a flap behind that wheel, to prevent water and mud being projected.

   Synonyms

   fenderwing

2. An upper element of a sneaker above the midsole generally of waterproof material to prevent water and mud soiling the top in outdoor activities.

Noun

1. a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels

   Synonyms

   splash guardsplash-guard

   Broader terms

   fenderwing