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when you tuck your penis and balls in while taking a shit and the shit is so big that it touches the tip of your ballsack, leaving a nice brown present for you to clean up.
Guy- Ah man I took the biggest shit yesterday and it gave me a hershey sack!

Other Guy- Damn dude that happens to me all the time.
by C-Dub3 March 31, 2008

Words related to hershey sack

balls big hershey sack shit