(:( OR ):) 

schrödinger's emoticon;

Happy and/or sad...mixed feelings.

He's such a douchebag but he's soooo hot! (:(

Ugh wish I could've seen either Katy Perry or Miley Cyrus tonight because they are the best!!! ):)

~ Could be either (:( OR ):) ~

(:( OR ):) by thehappyblonde_03 October 10, 2014

-or 

New saying, definatley slang, used to make words that end in er sound more omnipotent.

water to WATOR or runner to RUNNOR

-or by Mike May 2, 2004

or 

Inclusive or. Same as "and/or". This is different from xor, exclusive or. Takes precedence after and.

Good usage: "It could be the engine or the transmission that's malfunctioning."
Bad usage: "It could be the engine or the transmission that's malfunctioning, or both." (Contains redundancy)

or by ￰ November 14, 2018

Or 

One of the most kind and understanding people to ever walk the earth. Her eyes are dark green and deep, and gives you a sense that she’s looking into your soul whenever you look long enough into them. She is short and beautiful, smart, talented but really shy. She is the girl of your dreams.

DUMBASS: Hey, see that shorty, Or? Sheesh, I’d totally bang her.
MASSIVE CHAD: No, go to horny jail! We are all beneath her.

Or by boazba May 31, 2021

-or 

can be added to any name to imply greatness

jessor, gregor, danor, faggor, etc. . .

-or by Fagbot and jessor December 27, 2003

Or 

massive ass and super cute but also the dumbest ugliest whore you will ever meet

have you seen or today
nope but i saw her ass

Or by BreeBreeBre June 3, 2020

or 

Boolean logic operator where at least one argument in the expression must be true in order for the whole statement to be true. Often denoted with '+' ('||' in programming languages).

if x=1 and y=0, then

(x OR y) = 1

or by cloudRunner April 19, 2006