Reverse Mummy

Reverse Mummy(-ify)/v/: To use ones urine as a hose in the interest of uncovering excrement in an overflown toilet.

Ex 1: The porta-potty held great treasures; I executed a perfect Reverse Mummy and uncovered the lost marvel TootenKhamun!

Ex 2: Hey Helga, come over to the bathroom! I Reverse Mummified your spitting image!