two-faced


two-faced (http://definr.com/two-faced)

     adj 1: marked by deliberate deceptiveness especially by pretending
            one set of feelings and acting under the influence of
            another; "she was a deceitful scheming little thing"-
            Israel Zangwill; "a double-dealing double agent"; "a
            double-faced infernal traitor and schemer"-
            W.M.Thackeray [syn: ambidextrous, deceitful, double-dealing,
             duplicitous, Janus-faced, double-faced, double-tongued]
     2: having two faces--one looking to the future and one to the
        past; "Janus the two-faced god" [syn: Janus-faced]