Someone who's not really a troublemaker, but wants more than anything in the world to be accepted by the world, so does everything a troublemaker would do, thinking that being one is the answer to the question of what's wrong. A mama's boy or mama's girl posing as a rebellious teenager their entire life, well after their eighteenth birthday.
by Solid Mantis February 4, 2020

Someone who thinks they've worked harder at everything than everyone else throughout their lives. Someone who thinks everyone else was just joking around or playing games while they were more committed than everyone else, outdoing them at everything.
He/she was the worst kind of poser, the kind that wanted/expected to be taken seriously at least some of the time (when he/she wanted to, or at oppurtune times). He/she had a high opinion of himself/herself.
by Solid Mantis January 27, 2021

The girl wanted to look like a boy, as long as the boy was an athlete or an astronaut and not a loser. If the boy she was trying to look like was a loser, she would turn into a coward and let a male look like the loser. All of that could be avoided by being yourself, instead of living your life as a poser.
by Solid Mantis March 14, 2021

Someone who wears a hair metal band shirt to a thrash show and tries to fit in and get away with it.
Thrasher 1- “Hey look at that poser over there wearing a Motley Cruë shirt!”
Thrasher 2- “Let’s beat him up!”
Thrasher 3- “MAKE HIM HURT!”
Thrasher 2- “Let’s beat him up!”
Thrasher 3- “MAKE HIM HURT!”
by MrSquister June 6, 2022

Someone who acts like someone they're not, but they don't realize that there being fake, basically a loser trying to fit in. They usually buy ‘trendy’, fake- fancy stuff to look better for people and acts like the majority.
by Mafercr December 10, 2017

If a guy has convinced people he's Italian (such as an actor in a movie), but he's not really Italian, no matter how believable the guy is, he's not authentic, so he's a poser.
The poser had convinced people that he/she was from hell and that he/she was hell, but since there was no hell, he/she was just another otherwise obscure poser.
by Solid Mantis May 1, 2020

The narcissistic girl saw a badass shark when she looked in the mirro and thought that everyone else could see in her what she saw in herself, but they were looking at her spirit and not her appearance, and all they saw was a plain and bossy poser that everyone had tried to keep from drowning her entire life.
by The Original Agahnim October 31, 2021
