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shorthand for term "and/or".
I have to return it a/o exchang it for something in my size.
a/o by MsNutMeghan May 12, 2015
refers to anal and oral sex, from personals ad on yahoo.
i,m looking for someone who is into a/o sex.
a/o by kingfish February 5, 2005
Often used in celebratory fashion.
Ex1. "Hey its-a-me"
"A-O!!!!!"

Ex2. "Yo dis chick said she would totally give you head"
"AAAAA-OOOOOO!!!!!!!!!!"
A-O by hasselhoffman March 6, 2009
A.O is a very fun and outgoing guy. He has a smile that will brighten anyone's day and eye's that alway's have the girl's looking twice. He is a kind, sweet, trustworthy, cute, caring, smart, clingy, loving person that will alway's be there for you. But dont take his kindness and sweetness as a weakness, if you ever dare too touch his girl or anyone in his family, he would be the first guy too beat a fool up.
A.O has alot of female friends, but his girl alway's come before them. If you ever get the chance too be with a A.O, take it and never let him go. Cause if you do youll regret it for the rest of your life.
*Did You See That Guy??....*

*Yeah That Must Be an A.O... Just Look At His Smile.. But Dont Try Anything, Cause He Has A Girl And He Wont Ever Do Anything To Hurt Her....*

*Did You See His Eye's??*
*Yeah I Did.. They Were Green And Sexi*
*Yeah I Thought Soo.. Had Too Look Back Twice Tooo Make Sure.*
A.O by YOUR DADS BOYFRIEND April 26, 2020
Im not retarded but through lifes experiences i have adult onset retardation (a.o.r.)
a.o.r. by Pollydol November 24, 2018

A.O.LEARY 

An amazing musical artist with many talents and long shlak. He will put his hands and your hands on your thighs.
Mattia - Damn, A.O.LEARY's music is the best!

Ironarse - True!
A.O.LEARY by Errgarlou October 6, 2020