Top Definition
Also known as Herpankerthardman HCl.
A fictional anti-herpes prescription medicine that has the side effect of "giving you the semi-controllable ability to teleport." May not actually cure herpes.
Guy: "Ever since I got herpex, sneaking into my girlfriend's womens only college is a snap!"
Girl: "So it completely cured your herpes?"
Guy: "No, um . . . Not the herpes."
by Escapist January 28, 2008

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