This completely bogus rule where if someone asks you for some form of food and then you ask them for the same thing you're required to obtain this food for them.
The epitome of a craprule.
"Get me a seven layer crunchwrap!"
"how about YOU get ME a seven layer crunchwrap!"
"FOODSIES, you owe me"
"fuck you and 'foodsies' you're a complete idiot"