a person, who appears to naturally have or show excessive pride in his/her self(self approving face) when his/her face is expressionless, without meaning to.
Kelly just has a resting smug face, she is actually a really humble person.
by ah ji April 29, 2014
We've all heard of resting bitch face, and I think we all know what it means. We would like to recognize other resting faces: people who just can't help but look a certain way without even trying. Our first is resting smug face: someone who just looks smug unless they're trying to look another way, like angry or amused.
That guy is so cocky, he even has resting smug face.
by wamathmom June 11, 2015