1. containing an unusual amount of grease or oil

e.g. greasy hamburgers
oily fried potatoes
oleaginous seeds

Synonym: greasyoilysebaceous

2. unpleasantly and excessively suave or ingratiating in manner or speech

e.g. buttery praise
gave him a fulsome introduction
an oily sycophantic press agent
oleaginous hypocrisy
smarmy self-importance
the unctuous Uriah Heep
soapy compliments

Synonym: butteryfulsomeoilysmarmysoapyunctuous