Top Definition
A Pepto-Bismol taken prior to a date, party, or other important social function in order to prevent any bowel-related mishaps during the event.
1. I wish I hadn't had Panda Express for lunch. I need a Precautionary Pepto before I hang out with Bridget or else I'm gonna get the runs.
by headofblackmusic June 26, 2011

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