Duffin my arse...

"But Xym, it's a Muffin... AND a doughnut! A duffin!"

Sorry, I think you'll find it's actually a Muffnut.

That said, asking my harem of Starbucks serving wenches to give me muffnuts could give them the wrong impression.

Although, this IS "Teh" Xym, so wouldn't be all that wrong, now would it!