A muffin that does not contain (throughout its inner
cake) any of the ingredients displayed on the top of the muffin. Term can be applied to people in an organisation who appear to do
work but who achieve
little.
You buy what looks like a
delicious fruit stuffed muffin but find that inside it is all
cake and no fruit. It looks good but delivers nothing. It’s not a muffin, it’
s a nuffin.