shorthand for term "and/or".
I have to return it a/o exchang it for something in my size.
by MsNutMeghan May 11, 2015
refers to anal and oral sex, from personals ad on yahoo.
i,m looking for someone who is into a/o sex.
by kingfish February 5, 2005
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