The Donny Difference

The Donny Difference is heard in the popular movie "Ted 2" a janitor named "Donny" says to the head of Hasbro saying "I know which urinal you use, number 4. most janitors just flip over the urinal cakes but put in new ones, that's the Donny difference." and is also used as a secret password.

Friend 1 "Hey man, went I went to the bathroom they had fresh cakes in there."
Friend 2 "the janitors here must have learned The Donny Difference,"