Definitions by RoboCop's Cunning Linguist

Mexican Penguin 

The waddle a person does with their pants around their ankles after having a bad case of diarrhea and realizing there is no toilet paper left on the roll and no back-up items in reach.

“Dude, I had to do the Mexican penguin all over the house with the backs of my legs dripping yesterday's lunch just to find something to wipe with!”

Mexican Penguin by RoboCop's Cunning Linguist August 19, 2013