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1.
Internet acronym for "Only Disturb If Urgent".
I always make sure to put up my ODIU sign when I need some time to myself.
Speaking of which...*hangs up ODIU sign*

http://outfitinspirations.com/wp-content/uploads/istock_doorsignxsmall.jpg
by JZ875 July 11, 2008
1 2
 
2.
Any major event in life, used mainly to describe a significantly outstanding situation. Usually negative. Used as "odium" in noun form.
"It was odius how Jay got his car stolen."

"Sorry I couldn't come to work last week, I was met with the unfortunate odium of my grandfather dying."
by Desimodontidae November 05, 2005
12 21