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1.
Noun: The cross between a smile and a smirk; an outward expression of warm and fuzzy contentment; the human equivalent of feeling Smurfy.

Verb: To smile while almost laughing, but still laughing on the inside; to feel warm and fuzzy as if you had drunk a Macchiato while while reading a Christmas card from your best friend; The act of smiring

Adjective: To describe something as having smirish qualities; to be in a state of smiritude; smirishness
1) After receiving a present of paperclips which had been blessed by the Dali Lama she did not know if she should laugh or cry, so she simply smired
2) The warm and happy glow of his contentment was clearly evident from the smir on his face
by Jecko Montoya January 01, 2009