Definition of "unctuously" []

• Insincerely and excessively charming (adverb)

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• ""Howdy, Miss Georgie?" he called unctuously through the open door."
• "I hate to disappoint you but now that I can see again I have been able to brush that chip off my shoulder and now, in my new enlightened state, I have transmogrified and become that most dreaded of creatures - a righteous and unctuously nice creature with nothing controversial to say ever again - at least until Don Herradura arrives with his potion (as suggested by Rick with keen insight)."
• "(The television shrieked, unctuously) My uncle retreated into complete obscurity (Tin, leaky words emanated out from speakers, deadpan laughter sitting vaguely in a void) — rolling creak."