

I found this in websters:
Did·dle/ˈdid(ə)l/ verb 1. cheat or swindle (someone) so as to deprive them of something:
informal
"she thought she'd been diddled out of her pleasure by his small dic"
2. pass time aimlessly or unproductively by jacking small dic:
informal North American
"why diddle around with a useless nub?"