meaning of double faced
1. Having two faces designed for use; as, a double-faced hammer.
2. Deceitful; hypocritical; treacherous.
3. 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