Neurum Creek Gear Shift

During sexual intercourse, a Neurum Creek gear shift occurs when one reaches into their partners anus, causing their anus to prolapse. They then use their hand to reinsert the partners rectum into the anus, completing the Neurum Creek gear shift.

“Hey, have you seen Xavier today?”
“Not since last night- pretty sure he’s in hospital, James gave him a Neurum Creek gear shift”