Adjective: oleaginous ,ow-lee'a-ju-nus- Unpleasantly and excessively suave or ingratiating in manner or speech
"oleaginous hypocrisy";
- buttery, fulsome, oily, smarmy [informal], soapy, unctuous
- Containing an unusual amount of grease or oil
"oleaginous seeds";
- greasy, oily, sebaceous
See also: fat, fatty, insincere