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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
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2
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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