IPA: /ˈsmɑːrmɪnəs/
KK: /ˈsmɑrmiːnɪs/
The quality of being overly flattering or ingratiating, often in a way that is insincere or annoying.
His smarminess made it hard to trust his compliments.
Smarminess is derived from the adjective 'smarmy' (originating from the dialectal English 'smarm', meaning to smear or to be excessively flattering) combined with the suffix '-ness' (meaning the state or quality of). The word 'smarminess' refers to the quality of being smarmy, characterized by insincere or excessive flattery.
Think of someone who is excessively flattering or 'smearing' compliments — that's what 'smarminess' means, the quality of being overly ingratiating.