Definition of "diddy"
diddy1
noun
plural diddies
Quotations
(informal, Ireland, British) A fool, a tit.
Quotations
Hell, I almost regret editing out my original miss-spelling of the word 'literacy', since your sense of humour seems to be in need of some assistance, and that would have been a classic, one-off opportunity not only to make me look a right diddy, but to finally prove that Americans do understand irony.
2004 September 9, Iain McFadzen, “Remake of Taxi pissing me off”, in CGTalk
adjective
comparative diddier, superlative diddiest