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Deliberate or ironic misspelling of "poster," meaning a twitter user. Noun.
Alternative forms of the word include poast (n) – a misspelling of "post", referring to tweets.

It can be appended as a suffix behind other words, such as shitpoaster (n) or shitpoasting (v).
Trump was irritating, sure, but you can't deny he was perhaps this hellsite's greatest poaster
Poaster by joy8374(2 April 24, 2021
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ur info if all newbie pasted info poazing (posing)
Stop that poaster spamming his google + yandex bs.. its cyber generated
poaster by skullsfireNdieneverdie February 5, 2020

Posterize Moisturize 

When a basketball player is killing the game in the paint with his post skills.
A posterizes B
B: Damn, you really know how to posterize moisturize!
Posterize Moisturize by Halabtsi November 2, 2016

Postertizing 

Postertizing occurs when a poster to a message board or similar media attempts to sell a product or service.
Douglas was constantly postertizing on social media, always working in his insurance products.
Postertizing by I, Wreckerrr October 15, 2016

Zefron Poster 

A zefron poster makes a boss horcrux in AVPM. It is also one Harry Potter, Ron Weasly, Dumbledore and one Draco Malfoy's favorite chistmatic humanitaian. It is deeply rivaled by umbridges talor launtner poster.
Ron: THAT IS A BOSS ZEFRON POSTER!
and....
Dumby: He just seems like such a chistmatic humanitaian
and....
Ron: Let's take this bit of garbage down! (atempts to take Talor Launtner)
person of bad coding skills that pastes sources from unknowncheats/mpgh
Person 1: wow ur such a paster
Person 2: no dude i found these sources on unknowncheats!1
paster by dab-a-roo March 4, 2017

posterior funk 

The malodorous bouquet emanating from the back passage of an unkempt individual. Often noted by novice health professionals.
Novice: When I first examined him I felt oddly unwell. I would never have expected such a well presented gentleman to have posterior funk.
Senior: I think you mean posterior flank!
posterior funk by Posteriorfunk October 5, 2017