You may remember The Muffin Tops episode of Seinfeld, where Elaine comes up with the idea of selling just the muffin tops (because no one likes the stumps of the muffin).
Now Maccas believe she may have been on to something, with 'muffin tops' added to the US McCafe menu.
Word has gotten back to Seinfeld writer Spike Feresten, who has said that he wants compensation for coming up with the concept originally...some 20-odd years ago.
He's posted a video directed at Maccas, asking for a cool billion dollars...or a podcast sponsorship.
"What took so long?" he said.
"This episode was written 21 years ago."