UIM

Unintended Inspirational Mooning. When a person accidentally shows nekkid butt to the delight of onlookers.
"Did you see the photos of Ricky Berens' split swimsuit at the World Swimming Championships in Rome? Talk about a great UIM!"
by Queen of all Good Things July 28, 2009
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Open Seating

Mooning, intentional or otherwise
When the bagpiper's skirt blew up, I could see his open seating.
by Queen of all Good Things July 28, 2009
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