oleaginous
1. [ adjective ] unpleasantly and excessively suave or ingratiating in manner or speech
Synonyms: oily fulsome smarmy unctuous buttery
Examples:

"buttery praise" "gave him a fulsome introduction" "an oily sycophantic press agent" "oleaginous hypocrisy" "smarmy self-importance" "the unctuous Uriah Heep"

Related terms: insincere
2. [ adjective ] containing an unusual amount of grease or oil
Synonyms: greasy oily sebaceous
Examples:

"greasy hamburgers" "oily fried potatoes" "oleaginous seeds"

Related terms: fatty