Possible Clues:

• Most unctuous
• Most obsequious
• Least trustworthy
• Most greasy
• Superlatively slick
• Most unctuous way to attract attention, with art deceiving?
• Most greasy or most cunning love for wife
• One is prone in books to be most obsequious
• Most unpleasant and ingratiating in behaviour
• Most smarmy