OO (pronounced Oh Oh) - Owner Operator (otherwise known as a wanker)
You are such an OO! (you are such a wanker)
by MeriAnn March 1, 2008
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A tech term that means "Out of service"

It can be a site, server or a provider
ex.
Yahoo is now OOS

or
internet provider is OOS
by Omar AbuAli May 5, 2009
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Person 1: I bet you can't do a better pig than me on here!
Person 2: Bring it on
Person 1: (oo)
Person 2: <(^(oo)^)>
Person 1: YOU BITCH
by pwnageseb March 30, 2014
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Emoticon for surprise in a bit of a caught off guard sense.
Optimus Prime: Hey, your mom just showed up over here.
Christopher: (=oo
by Christopher Frame June 6, 2006
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How the MTV Music 24 edit of "WHATS POPPIN" censors the phrase "fool with this shit".
"Told Pooh he a foo-OO-OO

Told her don't let her friends know."
by WazPoppin October 8, 2021
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Just a pig's face 🐷 like, what else could it even be?
Me: awww what a cutie pie🥧(๑•ᴗ•๑)♡
Pig: •oo
by Michael the smart boy January 26, 2023
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The oldest known definition that precedes all these Millennial driven meanings is that of, "Yes, I understand" which has it's roots in martial arts training or history of the GoJu Ryu. That is the deepest most meaningful meaning. However, it also expands over a broader range to mean, "I see. I acknowledge."

Eg. Someone shows you how to do something. Oos! And is said in thankful tone.

You can approach someone right after graduation. Oooos! Said with excitement.

You can be reprimanded about something. Oos. Said with an I'm sorry attitude.

There is a whole yin-yang aspect to it. Can be soft, hard, or however it needs to conform to the scenario.
Tony was training for a full contact fight and was placed on a strict diet. While working for Sensei, he dumbly ordered a pizza and proceeded to eat it in front of Sensei. Clearly Sensei was not pleased. He reamed Tony out with disbelief. Tony replied in an apologetic but understanding manner, Oos Sensei. Tony went on to lose the fight is fat today

Johnny was courting Stephanie for a few months, but was holding out. When Johnny woke up in the morning with a massive smile, his roommate knowing that Stephanie slept over, he paused and said, Noooo?! Johnny said with a huge grin, YES! Johnny replied almost yelling, OOOOOOOS! and fist bumping him.

Jill was a 1st year resident at the local hospital. During the operating room procedure the surgeon showed her how to do a technique. She replied, thankfully, Oos. The surgeon said, "hunh". Jill said, oh, sorry...had you mixed up with my Sensei. The surgeon still confused proceeded with the case.
by Cat's Incredulous June 13, 2021
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