a dumbass guy, who usually sluts around with lots of girls who thinks hes the shit. Diddies usually think their extremely good looking, and sometimes are found trying to be extremely gangsta. Used in the same context as "biddie" for a girl, but used referring to a guy.
yo mayn you a big ass diddie.

shut up diddie.
by Craig gadna & KLoFosho June 03, 2006

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