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1 definition by slurogue

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