It sounds like something Ned Flanders would say.
I believe it just means "nothing at all". But what are the origins of the phrase? Is it common in the US as well as the UK?
The following is what I've found on the net about this phrase:
I have also found an interesting story about the etymology of the phrase.
(Editorial note: The copied story has been removed because of questionable copyright use. Also, the linked story is a joke and not a true etymology of the phrase.)
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