Definitions by Queen of all Good Things

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!"

UIM by Queen of all Good Things July 28, 2009

Open Seating 

Mooning, intentional or otherwise

When the bagpiper's skirt blew up, I could see his open seating.

Open Seating by Queen of all Good Things July 28, 2009