Short for 'Fiddling in the Nude'. A group activity where all participants get naked and proceed to fiddle with themselves and others around them in a sexual manner.

There is no limitation to the amount of people who can fiddley nu at any one time. Fiddley nu can even be conducted alone if necessary.
Simon: "Wanna get naked?"
Jono: "Fiddley Nuuuuu!!!!"
Simon: "Fiddley Nuuuuu!!!!"
Conor: "Wait for me! I want in on the fiddley nu too!"
by UrbanCondor March 5, 2009
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