Source : WordNet®

bloodsucking
     adj 1: drawing blood from the body of another; "a plague of
            bloodsucking insects"
     2: of plants or persons; having the nature or habits of a
        parasite or leech; living off another; "a wealthy class
        parasitic upon the labor of the masses"; "parasitic vines
        that strangle the trees"; "bloodsucking blackmailer"; "his
        indolent leechlike existence" [syn: {parasitic}, {parasitical},
         {leechlike}]