Top Definition
it means that you are gay and just plain and simple love to diddle cock in and around your mouth-- to diddle ones cock means to toss or jossle around in ones hand or mouth. if you are a girl it is a compliment to a guy...not so much.
"That new kid Aidan is such a cock diddler."
"Oh boy, my girlfriend is a great cock diddler."
by Christian Giordano April 28, 2008

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