Abbreviation for "injecting drug user," any drug user that injects their drugs intravenously with a needle.
IDU's should never share needles.
by avergonzado August 10, 2010
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A short way of saying 'I don't understand' it was first founded by. Josh A Daniell
Do you know if she'll go to the mall tonite?

Idu
by Josh A Daniell March 30, 2015
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Idu is a Carola who has hitten you in the belly with a phone or just has been annoying in another way. You can also call Idu any other person but Carola is the most Idu breed out there. Watch out you might not get rid of and “Idu” when It attaches it to your life.
“What did you just do?”
I’m sorry.”
You are an Idu.”
by Chen10000000 January 23, 2020
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Its when you're good at something (Video Game) and someone who is really bad that thinks they're good plays with you and they pass it on to you know you have it and it's hard to get rid of
Me:Dude man your so bad you have trashidus

Juul: shut up man im better than you it was just an off game
That stupid nigger ghave me Trash-Idus
by Barcode_112 May 11, 2018
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Bob: Bush did 9/11 I have proof!
Me: Show me the proof
Bob: 1 + 1 = 3 and therefor Bush did 9/11
Me: wtf?
Me: Idu
by ThatAnonymousThing :p September 2, 2017
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