Answer:

oiliest

Answer	Crossword Clue
OILIEST	Most sleazy
OILIEST	Most smarmy
OILIEST	Most greasy

OILIEST	Most slimy
OILIEST	Greasiest.
OILIEST	Most unctuous.
OILIEST	Like the slickest city slicker
OILIEST	Most unctuous
OILIEST	Least trustworthy
OILIEST	Superlatively smarmy
OILIEST	Most greasy or smarmy

OILIEST	Superlatively smooth-tongued
OILIEST	Superlatively slick
OILIEST	Most obsequious