O

Something someone says when they're too lazy to type "Oh".

Person 1: Sorry man I can't go to your birthday.
Person 2: O

by DylanPaterson July 7, 2019

:o

The act / face of being surprised.

OMG I didn't know he did that! :O

by Jak Dude May 5, 2005

o .

a way to make any conversation awkward

o .

by o . man September 15, 2010

;o

Smillie for joking or messing around

- ure mums teh hawt
- i know ;o

by hvg666666gh March 30, 2005

o/

The best way to say hello.

common idiot > hi steve
smart guy > o/

by lolcat guy April 11, 2008

'o'

Another way of using the :o emoticon, meaning shocked.

Guy 1: LOL I actually did it.
Guy 2: 'o'!

by Eric DeRienzo July 4, 2008

O-

One of the rarest forms of blood type among humans. A Universal donor.

O Negative
Blood type is very important because it can potentially be transfused to any patient regardless of their blood type. In emergency situations, when there isn’t enough time to determine a patient’s blood type, O negative blood is often used.

Best blood type to donate:
O +, O - (i.e. Son), B-, A- (i.e. ME) RH-
Only about 7% of all people have Type O negative blood
Type O negative blood is the preferred type for accident victims and babies needing exchange transfusions
There is always a need for Type O donors because their blood may be transfused to a person of any blood type in an emergency

O- is Universal donation for the masses. What is yours?

by KWatlonTyUniverseal April 18, 2010