Op
1: Original Poster - commonly used on Forums
2: Operator - commonly used on IRC or Game servers
3: Over Protective - commonly used in regard to relations
1: OP is an idiot.
2: Don't fuck with me, I'm an Op.
3: My mom is so OP.
by Ollie123, From MSCP January 12, 2011

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OP
Opening Post. The first post in a forum thread. Some define OP as 'original poster', but the posters I mix with say it means the opening post.
1) You havent answered the question in the OP.
2) When I read the OP I assumed this was a joke thread.
by Winston Ryder January 05, 2011

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OP
When a mommy and a daddy love each other very much, and they both have recessive genes, they give birth to something fouler than the meanest monster: an OP, or an original poster, namely of the website MyLifeIsAverage. The OP thanks to the fabled, horrifying "OP gene" steadily becomes a stranger and stranger individual as time goes on, beginning mainly at the age of two. People who hold this gene often tend to gain freakish obsessions with ninjas, unicorns, and fortune cookies. They are physically, often, unable to comprehend correct grammatical knowledge. There is no cure for OPism as of yet, though doctors advise what is playfully referred to as a "vasectomy" as a preventative action.
OP: "Today, I was hanging out on my college campus when I happened across a dinosaur. I rode Ralphie, my new pet dinosaur, into town, where we saw a guy in a banana suit sprinting away from a a guy in a gorilla costume. My professor then shouted "THAT'S WHAT SHE SAID" and received the Best. Highfives. EVER. Ralphie and I rode back outside, making sure not to pass a single crunchy leaf, when happened upon my little brother and my grandfather having a massive pirates versus ninja fight with Nerf weaponry. Best family ever? I think so. Then the Rolling Stone's song "Sad Sad Sad" came on my iPod. It was very ironic. Then we went to Wal-Mart and laughed at Twilight fans. Then, who did we see next you ask? Why only HARRY POTTER! We sang "Goin' Back To Hogwarts" with him 5 million times, and bid him adieu. On our way out of Wal-Mart, we saw Google destroy Yahoo yet again. IT. WAS AWESOME!!!111!5one"

MLIA Commenter: ...'Kay.
by Lorbah July 03, 2010

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OP
In forum terms, OP refers to the Original Poster. The person who began the thread.
ForumGeek911: So yeh, the OP said you were dumb.
OP: That's right, I did!
ForumGeek911: OMG, He just necroposted.
by Matthew Marvin August 01, 2007

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Op
A sound one makes when something unexpected happens, or a mistake is made. It can also be referred to as a shortened version of "Oops", except it's used more casually.
Op, Drew and Eli are fighting. Is this the end of a bromance?

Op, I helped my ex cheat on his current girlfriend in a baby nursery.
by omgitskee June 01, 2011

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op
Aside from meaning Original Poster, "op" can also simply mean "oh" or can be a statement typed after something peculiar has happened, or something that leaves you speechless.

This meaning has been made popular by Tumblr.
Person:"I can hear my parents having sex in the next room."
Also a person: "op"
by teenmother May 30, 2011

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Op
A pharse used when something akward is seen, heard or said.
Oh hell no she's not wearing that, Op!

Debby: Im going on a blind date tonight
Pat: word, tell me how it turns out.
(Debby calls Pat later that night)
Patty: How'd it go ?
Debby: Horrible
Pat: What happened
Debby: My date turned out to be Father Micheal
Pat: Op
by jaxjaxjaxjax February 01, 2011

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