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1.
OOR
Out of Range

Used in MMOs, letting people know that you're out of range from something.
I couldn't heal you because you were OOR on the other side of the room!
by Mangaza July 17, 2013
 
2.
oor
Out of room.

Used at the end of a text message that you don't want to be longer than 160 characters, even though you could say more on the topic being discussed.
To: Steve

Well I think the meaning of life is something that is more of a person to person thing, but here's my take. You should live your life to the fullest, have no regrets, and oor.
by Chosen Sloth May 17, 2010