When the lips of your anus, which form an "O", stretch to such an extent due to hours on the toilet, the "O" of your anal lips tear. Thus, you have blown your O-Ring, as well as lost your anal virginity.
"OH GOD! MY ANUS!"

"SUSTIN, ARE YOU BLOWING AN O-RING IN THERE?!?!?!"

*Blood and feces proceed to drip into toilet*
by Sustin Ramham March 21, 2015
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Taking a huge shit to the point that it makes your anus hurts for hours afterward.
A bit of a rip on Challenger's explosion due to a bad O-ring.
"Dude, all that Chinese buffet is going to make me blow my O-ring."

Guy 1 "Why are you walking like that? Did you just Blow an O-Ring? "
Guy 2 "Ate some nasty food the other night...God it hurts!"




by HankHill August 7, 2008
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taking such a tremendous shit that it feels like ur asshole just blew out...
oh man, that was one explosive shit, i think i just blew an o ring..
by HoMeS March 12, 2004
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