O.A. 

an abbreviation for over achiever; the person in school or work who pisses everyone off because they always have to do more than what is required, hand in assignments before they are due, they always have to be perfect, and they make everyone else look bad.

Eww, Kelly is such an O.A. She already finished the history paper that's due next week and she wrote two pages more than she needed to.

O.A. by Ashley Z. September 20, 2007

O.A. 

an abbreviation for over achiever; the person in school or work who pisses everyone off because they always have to do more than what is required, they hand in assignments before they are due, they always have to be perfect, and they make everyone else look bad.

Eww, Kelly is such an O.A. She already finished the history paper that's due next week and she wrote two pages more than she needed to.

O.A. by Ashley Z. December 31, 2008

O.A. 

Also knows as the Object of Affection. The person you want but can't have for whatever restrictive reason, yet you choose them anyway.

"Dude Caley is my O.A."
"Keith, she thinks you're a freak."

O.A. by frostythesnowbitch January 9, 2016

O&A 

Oran and Anal. Commonly used abbreviation in dating/sugar daddy websites. It asks or announces that a woman has good oral and anal sexual skills. NOTE: It does NOT mean she goes from anal to oral, or "ass to mouth". It simply states she performs both oral and anal sex.

"I require my future mistress to have good to excellent O&A skills."

"Sugar daddies: This little sugar babe is cute, petite and I have excellent O&A skills. I am a lady on the streets and a freak between the sheets."

O&A by Greatos, God of Whores February 15, 2010

O&A 

The signature embodying true love.

The signature of true love between two people.

A promise between two people

Ozzy-You've got no idea my girl. You are my life, my love, my world. O&A
Anna-and you mean everything to me my darling. O&A

O&A by Wild-Wild November 6, 2014

o.a.r. 

OF A REVOLUTION:

Marc Roberge (lead singer, rhythm guitar, amazing writer, co-founder)
Chris Culos (drums, co-founder)
Richard On (lead guitar)
Benj Gershman (bass)
Jerry DePizzo (saxophone, guitar)

Started out in Rockville, Maryland where Marc, Chris, Richard and Benj all went to high school together. Went to college at Ohio State University, where they teamed up with Jerry. Play in concert venues all over the country mainly on the campus scene. Live shows are one of the best around and song lyrics are always changing from city to city.

Their sound can be described as a mixture of many genres or groups including Sublime, Bob Marley, Dave Matthews Band, Phish, Grateful Dead, Guster, etc... but when it comes down to it they really can only compared to one band: O.A.R. Marc writes inspiring lyrics with deep undertones that everyone can translate to their own meanings disguised by catchy riffs, great instrumental interplay, and beats that make it feel like summer all year round.

o.a.r. - Crazy Game of Poker

So I said Johnny whatcha doing tonight?
He looked at me with a face full of fright
And I said, how bout a revolution?
And he said right.

o.a.r. by Diamond and One June 14, 2006

o.a.r. 

A totally sweetass band, whose music is best described as a mixture of Sublime and Dave Matthews Band. Based out of Ohio, where the temperature is never ‘just right’.

Did you hear the new O.A.R. CD? It rocks!

o.a.r. by Skuzzi July 19, 2003