double-tongued


double-tongued (http://definr.com/double-tongued)

     adj : 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, two-faced, double-faced]