Top Definition
OA
short for “objection: argumentative” \ generally used to avoid or nullify a negative question or remark
Whenever his ex asks him a question, he infuriates her by answering with OA.
by ΔиłĦ☼иצ ߀₡ʞ June 23, 2011
OA
The Filipino abbreviation for Over Acting. This term is usually used to describe a person who is basically a drama queen. Also implies immaturity.
She threw a fit in the store because they didn't have her size. She is so OA.
by lilmille August 16, 2005
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.
by Ashley Z. September 09, 2007
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."
by frostythesnowbitch January 09, 2016
OA
an acronym for "over acheiver". Used by high school students to describe someone who has a perfect grade in a class or does more work than necessary.
Person 1: I wrote two extra pages for my book report.
Person 2: You're such an OA.
by windbeneathmywings4ever September 02, 2005
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.
by Ashley Z. July 14, 2007
oa
In switzerland there's a famous rap-group called oa.
Somehow they managed it to make people say oa instead of awesome, fresh, good, cool etc.

so when you get to switzerland make sure, to know the meanings of "oa". (adjektive)
Man those guys look good, they look so oa!

Don't act oa, we know you're no good.
by mr_roksta December 16, 2008
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