Top Definition
Is when someone smiles at you and you cant help but smile back.
Me:Everytime you smile it makes me smile.
Me:Its really cute you have a contagious smile
by PopcornBuddy September 14, 2011
A euphemism for "herpes" in personal ads.
I have herpes, so I only look for personal ads that say "contagious smile".
by FredDill August 11, 2010
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