diddy, adj. — Green’s Dictionary of Slang

diddy adj.

[nursery pron. of SE little + the popularity of the Diddy Men created by the UK comedian Ken Dodd (b.1927)]

small, diminutive; insignificant.

1993		I. Welsh Trainspotting 86: Auld Baxter, god rest the diddy cunt’s soul, never really bothered aboot the rent cheque.
2004		(con. 1990s) N. ‘Razor’ Smith A Few Kind Words and a Loaded Gun 411: I was taken from work to my cell for a random spin (cell search) by four diddy members of the DST.
2009		L. McIlvanney All the Colours 14: [E]ndless profiles of diddy teams.
2011		Eve. Standard 13 Apr. 32/1: She thought the diddy living room was ‘cool’ too.
2024		J. Meades Empty Wigs (t/s) 618: He bled through his coarse striped uniform - ‘He’s got the rags out - the little diddy sweetheart!’.