unethical
     adj 1: not conforming to approved standards of social or
            professional behavior; "unethical business practices"
            [ant: {ethical}]
     2: not adhering to ethical or moral principles; "base and
        unpatriotic motives"; "a base, degrading way of life";
        "cheating is dishonorable"; "they considered colonialism
        immoral"; "unethical practices in handling public funds"
        [syn: {base}, {dishonorable}, {dishonourable}, {immoral}]
Source: WordNet® 2.0