The Collaborative International Dictionary of English v.0.48:

bearcat \bear"cat`\ n.
   an arboreal civet of Asia (Arctictis bintourong) having a
   long prehensile tail and shaggy black hair.

   Syn: binturong.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

bearcat
    n 1: arboreal civet of Asia having a long prehensile tail and
         shaggy black hair [syn: binturong, bearcat, Arctictis
         bintourong]