Where There's Smoke, They Pinch Back
The phrase is constructed from two Hotel Mario phrases, "When you pinch Wendy's pennies, they pinch back!" and "Where there's smoke... there's fire!". mrSimon coined the phrase to highlight the repeated usage of character animation cels during these two shots in Hotel Mario.
The purpose of the slogan has been criticized by many, as it acts as a method to create a richer brand identity for Youtube Poop, which many believe is inappropriate in relation to poop.