See unctuous in American Heritage Dictionary 4 Synonyms
unctuous fulsome oily oleaginous smarmy
These adjectives mean insincerely, self-servingly, or smugly agreeable or earnest: an unctuous toady; gave the dictator a fulsome introduction; oily praise; oleaginous hypocrisy; smarmy self-importance.
See unctuous in Webster's New World Roget's A-Z Thesaurus II
adjective
Affectedly and self-servingly earnest:
fulsome, oily, oleaginous, sleek, smarmy. See attitude, honestHaving the qualities of fat:
adipose, fat, fatty, greasy, oily, oleaginous. See fat
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