Extension, inspired by Ned Flanders, of the commonly used word "fuck"
Adds emphasis and humour to an already overused word at the cost of it's sometimes offensive nature.
(It still should be considered unwise to use in
front of in-laws,
teachers etc.)
Kid A - "You have squashed frog between your
toes!"
Kid B - "Fuckdiddly!"
Kid A - "I hear your 'fuckdiddly' and accept its
light-hearted application to this frog-related incident"