adj. 1. drawing blood from the body of another; as, a plague of bloodsucking insects. [ WordNet 1.5 ]
2. having the nature or habits of a parasite or leech; living off another; -- of plants or persons; as, a bloodsucking blackmailer; bloodsucking lawyers. Syn. -- parasitic, parasitical, leechlike. [ WordNet 1.5 +PJC ]