Under There

Originally used as a nautical direction to describe where the porpoises live, 'under there' gained popularity in the early 20th Century with acolytes of Aleister Crawley, who repurposed the expression to define their standing with the The Great Old Ones.

Contemporary uses include the location of a shoe, a dropped washer, a peanut and the quarter required to make exact change for the pizza guy.

Officially, this phrase has never been used to bait a person into discussing unmentionables in a publicly embarrassing way, though certain conspiracy theorists like Nick will argue that this has occurred.