A rude, nasty, verbally aggressive person (usually a woman but not always) who makes snide comments through a fake, neocortex smile.
Normal Person: I talked to someone at the baggage claim who said that they would have my bag ready within four hours.
Smiling Bitch: Oh. Well, I guess that they must have been wrong.
Normal Personal: Why are you smiling?
Smiling bitch: Because I'm not just a bitch, hon, I'm a smiling bitch.
Smiling Bitch: Oh. Well, I guess that they must have been wrong.
Normal Personal: Why are you smiling?
Smiling bitch: Because I'm not just a bitch, hon, I'm a smiling bitch.
by AYYFRON January 27, 2011
by bob-o loblaw May 13, 2008
by endergirl55 August 16, 2015
The face you make when you are smiling at someone while imagining all manner of death and unpleasantness happening to that person
by Zonchar February 23, 2021