U.D.I

Unidentified Drinking Injury.

An injury such as a scratch or bruise that is obtained when in a state of drunkeness. But have no recollection or memory of how it was received.
Mate, i've got a well bad U.D.I on my arm. I must of done it last night when i was pissed!
by U.D.I United May 16, 2006
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U.D.I.

Unidentified Drinking Injury - A mysterious injury received during a bender (qv) and of which the victim has no recollection
"Honestly Officer, Me and my brother N-Lew don't know WHAT happened. We was just heading back from the Tav with these 2 georgous chicks and when we woke up they'd turned into Swamp Donkeys!" said J-Lew. "Must have been some sort of U.D.I." N-Lew added
by Daxxler February 06, 2003
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U.D.I.

Stands for Unidentified (or Unknown) Drinking Injury. Any kind of injury that is impossible to explain due to the fact that the injury occurred while drunk or otherwise in a wasted state.
When I woke up the next morning, there was an abundance of U.D.I.'s: scrapes, bruises, open flesh wounds -- I thought to myself, "I don't remember walking through a swamp or viciously attacking a laundry hamper."
by slurogue February 27, 2009
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U.D.I

Un identified drinking injury.
I've got a fuckin great bruise on my head, I can't remember how I got it , I was out on the piss last night.hence U.D.I.
by Christback2 April 01, 2014
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