But here he is, smiling unctuously and shaking hands with the Maharajah of Jaipur.

unctuous (adj) : 1. of the nature or quality of an unguent or ointment; fatty; oily; greasy 2. having a smooth, greasy feel, as certain minerals 3. bland; suave; also, tender; fervid; as, an unctuous speech; sometimes, insincerely suave or fervid – source: The Observer Magazine 16.2.2003, p. 31