o-o 

A Hawaiian bird that's probably extinct.

P1: Have you heard of an o-o?
P2: No, what's that
P1: I dunno either, but it has a funny name.

o-o by tiky May 21, 2021

O-O 

King-side castling or short castling, a move in chess consisting of moving the king two squares toward the king-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, or if the king or the rook in question has already moved. King-side castling is notated O-O.

1. e4 e5
2. Nf3 Nf6
3. Bc4 Bc5
4. O-O O-O

O-O by ronnosexual August 12, 2022

o.o; 

The ; is represented as a sweat drop.

See o.o

P1: OMG WOW HOW ARE U?!

P2: o.o;

o.o; by Wistful July 6, 2005

o_O 

Confused, stunned, or weirded out.

o_O what do you mean?
o_O what is that?!
o_O Whoa wtf

o_O by DWBoy February 19, 2003

o////o 

An emoticon used to indicate the person is blushing, embarassed, etc.

person 1: zomg, do you really like him?!
person 2: um.. o////o

o////o by dfskdshjdsahdsa April 28, 2006

O_O!

Very shocked

You slept with a dog?! O_O!

O_O! by Leo =] April 14, 2003

o.o` 

an emoticon used generally to express confusion. The accent at the top is not a sweat drop, but rather a raised eyebrow.

AKA: o_o` o.O

peep1: So I says to him, I says "dude" and he was like "check it, man"...you know what I mean?

peep2: ...o.o`

o.o` by St0DaD May 4, 2007