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A colloquial term, originating from the NSW Central Coast of Australia, referring to the male reproductive organ when in its flaccid, non-erect form.
Please don't flick my diddy.

That old pedo touched my diddy.

Ouch, you hurt my diddy.
Diddy by JayVeeDawg July 30, 2011
1. to not keep your word.. a nicer way to say lying..
girl-"yea imma come thru!"
guy- "you said that last night"..."stop the diddy!"
diddy by j. lo May 25, 2003
a fully nice person with a large penis to rape children with
he is such a diddy
diddy by anal poo bum wee wee August 17, 2014
diddy by Rachelsqu May 26, 2003
slang for any type of usable thing
The boy referred to his guitar as a diddy
diddy by Daniel October 9, 2003
A small gathering or "get together" of close friends. A celebration (if you will) filled with merrymaking and idle chatter.
Kristin, please come to my diddy this evening dressed in denim and carrying a reptilian flask.
Diddy by Serena Leahy December 11, 2008
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