adj. Falsely or affectedly earnest; persuasively suave.
the GNU version of the Collaborative International Dictionary of English
adj. Having the nature or qualities of oil; oily; unctuous.
The Century Dictionary and Cyclopedia
Having the qualities of oil; oily; unctuous.
Figuratively, effusively and affectedly polite or fawning; sanctimonious; oily.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. unpleasantly and excessively suave or ingratiating in manner or speech
adj. containing an unusual amount of grease or oil
Word Usage
"Amanda Platell, in the Daily Mail, wrote of the "tawdry, inexorable decline of Hugh Grant" whom she described as an "oleaginous, womanising lounge lizard"."