o__o 

1. Similar to the emoticon o_o but with an extra underscore (_).

Upper case Os are used more often to denote more shock than lower case Os.
Generally used in the same fashion (shock, look of bewilderment, blank stare, skepticism, or weirded out). However, the extra underscore is added to denote more stronger emotions.
2. Also may be used when an o_o may not want to be repeated.

1. Person 1: I found out I was adopted
Person 2: o_o

2. Person 1: And that I'm really a robot
Person 2: o__o

Person 1: It all came to me when I fell off a cliff and into a girl's house
Person2: O__O

o__o by Guest3 June 18, 2011

O_O 

1. O_O: shock
2. o_O or O_o: confusion, wtf?, etc.

1. >MY MOM DIED!
>O_O you're KIDDING!
2. >I want to have your children.
>o_O but you're a guy . . .

O_O by the das October 25, 2004

O___________________________________________O 

dumbstruck, dumbfounded,stunned

Guy #1: "i just shot come out my eyes!'
Guy #2: "O___________________________________________O"

O___________________________________________O by fuckin sexy ass May 9, 2010

(O)_(O) 

Traumatized.

Daniel: Holy shit my cock's hard it's turned purple!
*Takes off his pants, revealing his vividly purple python*
Sarah: (O)_(O)
Katelyn: (O)_(O)
Charlotte: (O)_(O)
Tony: ( ͡° ͜ʖ ͡°)
Wtf Tony?

(O)_(O) by wide idiot December 29, 2020

o_o 

These are faces used in chatrooms, emails, and Instant messengers.

o eyes
. or - or _ mouth

* you also can add the ; as in sweat drops in expressions like: Surprized, weirded out, scared, or Thats emberessing..

Examples or Faces:
o.o
O.o
o.O
O.O
._.
o_o
O_o
o_O
O_O
>_>
<_<
^-^
*-*
$_$
@_@
@.@
^.~
o.-;

Characters:
<(-"-)> - Kirby
'x' - Kitty
(\_/)
(^.^) - Bunny
o((")(")
\)
('o' ) - Bird
(| |)
""
(o)_(o)
( '_o' ) - Koala bear thing..
(__oo_)
('o')__('o')

o_o by Ashi-San February 11, 2004

(""\_(o_O)_/"") 

A BIG BEAR HUG!(bear is drunk)

Me: Rawr! come give me a big hug!
(""\_(o_O)_/"")
Random newb: Hey! get the hell of me!


Me: Rawr! come give me a big hug!
(""\_(o_O)_/"")
Veteran player: RAWR! (""\_(o_O)_/"")

(""\_(o_O)_/"") by Funk March 12, 2005

O)_(O 

A facial expression used to represent a particular emotion that cannot be described by the simple means of O_O. It has a wide array of representation, for example, a longing for a particular object or simply a loss of words.

Nas: Have you heard Lady Antebellum's new song?
Jay-Z: O)_(O

O)_(O by Murd3rface April 22, 2010