Top definition
A sexually transmitted disease. Its effects include burning sensation while urinating, uncontrollable fist pumping, craving for beef pancakes, and feltching.
Guy 1: "Yo, dude! That chick you picked up last night was slammin hot!"

Guy 2: "Yea, man. That ho was dirty. I think she gave me GSTAMIDS. Hey, can I see your gerbil?"
by GSTAMIDS February 24, 2009
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