O-O-O 

Queen-side castling or long castling, a move in chess consisting of moving the king two squares toward the queen-side rook on the same rank and then moving said rook to the square the king passed over. The move cannot be performed if the player is in check, if the king or the rook in question has already moved. Queen-side castling is notated O-O-O.

1. d4 d5
2. Nc3 Nc6
3. Bf4 Bf5
4. Qd2 Qd7
5. O-O-O O-O-O

O-O-O by ronnosexual August 12, 2022

o_O_o

Also "O_o_O"; Used to show an unusually weird reaction to hearing unusually weird news.

This word is internet slang and cannot be pronounced.

Example:

Person #1: My cat gave birth to a puppy.

Person #2: o_O_o

o_O_o by abf February 22, 2008

:o :o :o 

A Triple Headed Shock Monster, also known as a THSM. A set of emoticons expressing extreme shock.

John: I killed a man again!
Abe: :o :o :o
John: Yeah... what?

:o :o :o by DaveyJones December 30, 2008

O.o.O. 

Abbreviation for "Out of Office"

Commonly seen in a work environment in the form of Email.

To: John Doe
From: Jane Doe
Subject: O.o.O.

I will be Out of the Office today on business to visit a customer.

O.o.O. by Zachry Diehl September 15, 2006

o/o\o 

Emoticon representing an eiffel tower

Hey Dan, you know what we should do to Lateesha later?
Dunno.
o/o\o

o/o\o by The Towererer May 11, 2011

O_O_O_O

Means something that is much more surprising than a simple wide eyes.

also counting: o.o.o.o

Example 1:
random person #1: Dood, I got like $500,000
random person #2: O_O_O_O_O_O

Example 2:
person #1: I'm pregnant with your man's baby.
person #2: O_O_O_O_O_O_O_O_O_O what?!?!

Example 3:
person 1: Hey what's up?
person 2: Nuffin much, you?
person 1: Oh nothing really 'cept I got beamed up to an alien ship and was probed multiple times, other than that, nothing really.
person 2: ...o.o.o.o.o.o

O_O_O_O by animechick3344 August 19, 2007

o.O O.o 

confusion

...and this and that do you get it now?

o.O O.o

o.O O.o by Saetern June 7, 2018