The insincerely constant smiling expression on the face of a politician or other performer, which is meant to ingratiate oneself with voters/fans, as opposed to being a true expression of the person's feelings.
Headline of a political commentary article: "Mitt Romney: the man behind the perma-smile."
"Because she's always wearing that perma-smile, it's hard to know what's really going on with her.
by Mme K
September 21, 2012
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