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1.
ORN
An acronym for "Oh really now!": A sarcastic response to a statement that is obvious or frankly false.
Person 1: I do not suffer from insanity..... I enjoy every minute of it!
Person 2: ORN!
by Gladiator Bed-Warmer December 12, 2009
 
2.
ORN
short for "Oh Really Now!" which is used for several reasons to include: (1) As a response to when a person feels someone has stated something in a boastful manner, implying a high or superior status; (2) As a response to when someone feels competitive with another, or feels doubtful of another; (3) As a mood-elating fun statement.
(1) Frank: "I can bench press over 300 pounds."
Dan: "Oh Really Now?"

(1) Matt: "I cleared over 200k last year."
John: "Oh Really Now."

(2) Bob: "I used to run a mile in less than 5 minutes. I could do it right now if I wanted."
Bill: "Oh Really Now."

(3) "Oh Really Now! Orn!"
by Orn May 22, 2011
 
3.
orn
short for or not.
ex1: Psh, do you want a ride, orn?


ex2:
guy-Ya, girl give me some head right now.
girl-**scilence..**
guy-ORN.
by ohmananotherword July 10, 2008
 
4.
Orn
Extremely large anal cavity
the size of my shit denotes that i must have an Orn
by SoL January 12, 2004
 
5.
orn
to be extremely ugly about what you do
Kevin Fenzil has makes an orn face all the time.
by Patrick Ryan Lewis March 03, 2008