Also known as the "Botox smile", it is the name given to a fake smile, or a smile that only uses your mouth and not your eyes. The name refers to Pan Am stewardesses, who would have to always have on a smile when around passengers, even if it was insincere.
My mother flashed her Pan Am smile at the clumsy waitress, who would not be getting a tip.
by saramous3 December 12, 2016
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