A warmed, crusty French roll arrives split, lightly smeared with unctuous chopped liver.
-- John Kessler, "Meals To Go: Break from the routine with Hong", Atlanta Journal and Constitution, October 22, 1998
She recalled being offended by the "phoniness" that stemmed from the contradiction between her mother's charming, even unctuous public manner and her anger in private.
-- Daniel Horowitz, Betty Friedan And the Making of 'The Feminine Mystique'
He approached Sean wearing a smile so unctuous it seemed about to slide right off his face.
-- Naeem Murr, The Boy
Origin:
Unctuous is from Medieval Latin unctuosus, from Latin unctus, "anointed, besmeared, greasy," past participle of unguere, "to anoint, to besmear."
\UNGK-choo-us\ , adjective;