The Collaborative International Dictionary of English v.0.48:

malodorous \mal*o"dor*ous\, a.
   Offensive to the sense of smell; ill-smelling. --
   mal*o"dor*ous*ness. n. --Carlyle.
   [1913 Webster]

WordNet (r) 3.0 (2006):

malodorous
    adj 1: having an unpleasant smell [syn: malodorous,
           malodourous, unpleasant-smelling, ill-smelling,
           stinky] [ant: fragrant]