Resembling soap; having the qualities of, or feeling like, soap; soft and smooth.
source: Webster 1913
adjective satellite
unpleasantly and excessively suave or ingratiating in manner or speech
Buttery praise. Gave him a fulsome introduction. An oily sycophantic press agent. Oleaginous hypocrisy. Smarmy self-importance. The unctuous Uriah Heep. Soapy compliments.