1. On Facebook, when one posts status messages constantly or simply too many times throughout the day.

2. Posting too much information or information that is extremely personal or completely irrelevant on Facebook status messages.
She must really have no life, she is such an over-poster!
by Jenn2 September 8, 2010
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this occurs to many of us, mostly on facebook, or youtube, or even here. it is that feeling of regret and dissatisfaction when you think of how your comment could have been better. it can apply also when you have posted a hypotheses and you end up being proven wrong.
(walkin out to your car to get to work) haha, i should have posted that. oh well

a lot of posters remorse occurred on febuary 4 2008. gmen ftw
by fatguylittlecoat November 8, 2009
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You know those posters of scantily clad chicks in compromising positions that 15-year-old boys globally have tacked up on their bedroom walls? The ones where the girl is just teasing you, but not letting you see? Bathing suits, usually? Standard softcore crap for adolescents?

Yeah. Cheesecake posters.
"Have you seen all the Kournikova cheesecake posters?"

"My little brother's wall is COVERED in cheesecake."
by triviagame December 24, 2004
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The first person to post or comment within a form-style collection of comments.
By creating a new thread, the original poster opens a discussion on a particular topic.
by Ant90 March 24, 2020
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A person whose main goal in life is to post first on an internet video, picture, or anything else that allows comments. Usually this person will simply post "First!" or something along those lines rather than making an insightful or meaningful comment. First posters, while they themselves often believe that they are serving a valuable purpose and/or accomplishing something by being first, are generally disrespected by much of the rest of the online community.
First poster #1: "I was the first to post on a Failblog picture on March 17, 2008. It ended up getting 946 comments."
Neil Armstrong: "Wow, that's really impressive. I was the first person to walk on the moon."
Babe Ruth: "I was the first player to hit 60 home runs in a season AND the first to hit 700 career home runs!"
Albert Einstein: "Well I was the first to prove the relationship between mass and energy as well as many other fundamental principles of the universe that had puzzled scientists since the beginning of time."
Sir Edmund Hillary: "I was the first to climb Mt. Everest."
First poster #1: "What did you do up there?"
Sir Edmund Hillary: "I put up a sign that said 'First!!!' and got my ass back down that mountain. It was freezing up there, dude!"
God: "Well I was the first to create, well, you know, everything in the entire universe."
First poster #2: "Sweet man, congrats. I was the first to comment on that YouTube video of the news anchor accidentally saying 'blow job' on live TV."
Neil Armstrong: "LOL! That video was classic! Epic fail!"
Other commenter: "Shut up, all of you!!! Nobody cares if you're first! Get a life!"
by Nicholas D July 27, 2009
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Someone who is the perfect fit for a stereotype.
That girl who says "like, omg" all the time is the poster child for a Valley Girl.
by Im Caca for Cocoa Puffs January 23, 2008
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A dead cat that used to be Jimmy's pet. But now Jimmy wants a dog.
Dad- Son, I have some bad news
Jimmy- What is it Dad?
Dad- It's about your cat, Poster
Jimmy- Poster Nutbag ??
Dad- Yes
Jimmy- What is it Dad?

Dad- ...Your cat DIIIIIIEEEEEEEDD !!!
by Poster Nutbag May 20, 2003
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