The definition of smarmy is someone who comes across as being insincere.
An example of someone who is smarmy is a used car salesman who tries to come across as if he is a distinguished businessman making you a fair deal but who sounds like he is lying.
Flattering in an oily, insincere manner; unctuous.
Relating to or indulging in lewd conduct; smutty.
Excessively ingratiating or insincerely earnest.
Origin of smarmy
- From smarm to smear
From American Heritage Dictionary of the English Language, 5th Edition
- From smarm, a variant of smalm/smawm.