The Collaborative International Dictionary of English v.0.48:

Musang \Mu*sang"\, n. (Zool.)
   A small animal of Java (Paradoxirus fasciatus), allied to
   the civets. It swallows, but does not digest, large
   quantities of ripe coffee berries, thus serving to
   disseminate the coffee plant; hence it is called also coffee
   rat.
   [1913 Webster]