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
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?
by DaveyJones December 31, 2009
An emoticon used to indicate the person is blushing, embarassed, etc.
person 1: zomg, do you really like him?!
person 2: um.. o////o
by dfskdshjdsahdsa April 13, 2006
music

it is someone with headphones on listening to music and enjoying it.
o(-. -)o: don't bother me i like this song.
by myfirstdeadpanda July 17, 2008
A face, similar to ^//^ and/or >//< . The o//o is a blushing face, however the eyes are open in shock or disbelief. This is not usually used as a positive way of blushing, such as ^//^ would be. o//o is usually used when someone is embarrassed or surprised.
Mom: I threw you a surprise birthday party, and invited all your friends, but they only had bright pink balloons

Me: o//o
by Sharp131313 November 6, 2013
Average (o)(o)
Cold breasts (^)(^)
Nippels De Grande(O)(O)
Breast Implants (@)(@)