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1.
a feeling brought on when a current fling's attitude reminds you of an ex-girlfriend.
if your current girlfriend happens to piss you off because of her lack in a display of affection, and this fact reminds you of an ex girlfriend, then she suffers from the "O" syndrome.
by Mark Ray May 07, 2006

Words related to the "O" syndrome

awkward bitch coincedence reminder sindrome the o