A situation where 2 people
simultaneously perform the cupcake movement on each other after farting at the same time. The exact
opposite of barter, due to it being 'a double
coincidence of do not wants'
"I trust last night went well, Sir?"
"Bally terrible
unfortunately Jeeves, i was planning to cupcake Aunt Agatha and at the very moment I gave it to her she turned and gave me one right back!"
"Ah, 'The French Exchange' Sir, a rare and exotic beast"
"Quite, Jeeves, quite- i've half a mind to leave her my
Richmond Regards"
"
Very good Sir"
From Jeeves and the Bottomist by P.G. Wodehouse