Another way of saying "retard" or "you're stupid". It's usually said in a deep "stupid voice"
Boris: I just walked into a door!
Doloris: You're such a di di di!
by Doloris July 03, 2007
Top Definition
Used to describe someone who is so incredible stupid at any given moment. It is believed by professionals that the word originated from people who are themselves di-didis to call others like themselves.
Guy: My girlfriend is awesome but she's such a di-didi.
Guy 2: what did you think was gonna happen if you date a Leyla.
Leyla: Hey who is this Leyla girl huh, you cheating on me?
by prince_guppy July 15, 2016
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