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 DonnyDifference,"
Another way of saying "whatever". It is often confused with "same thing", but you're really saying "OK, I admit that they're not the same thing, but they're not different enough for me to really care about it."
*goes to Africa*
African people: ooga booga du ooga booga duh
we've got to celebrate our differences
*goes to Mexico*
Mexican people: nacho taco chimichanga
American kid: because its beautiful when the whole world sings together
African person: ooga booga do booga do ooga donga
Chinese person: Ching ching chong ching chong
Mexican person: taco nacho nacho taco taco burrito