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An O Party is a group of people who have had sex with really large objects until they have stretched the anus/twat into a huge O shape. They then gather around in a circle, still exposing their stretched holes, around a group of men. The men then ejaculate into each stretched hole. Other things may be used to pour into stretched holes, like syrup or oil.
It caught me by suprise that the party I attended to last week was actually an O party!
by Wasabimoto December 14, 2007
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