The feeling of inadequacy or self-doubt despite achieving success or recognition.
I got promoted, but I can't shake off the impostorism, I feel like a fraud.
by UltraSmartGuy April 25, 2023
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What red always seems to be.
Green: I saw red vent, he's the Impostor
by Thepanzerofthelake September 22, 2020
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Often used as a term for a role you never ever get in the hit game Among Us, to be a killer in Among Us.
- Yo man, you sus.
- Bro it's not me I'm not the Impostor, I'm a crewmate like you.
- No, you sus.
by tarshboy69 October 8, 2020
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1. The correct spelling of "Impostor". IT'S NOT "IMPOSTER", YOU PSYCHOS!

2. A bootleg copy of Among Us hosted on Roblox.

3. What red always seems to be.
It's not spelt "Imposter", it's spelt "Impostor"!
by Live & Let Die November 1, 2020
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Someone impersonating someone, and not who they say they are.
Person 1: Yes! I got impostor, why did you get? Person 2: I am a freaking crewmate!
by Amongusfungus October 7, 2020
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Someone who pretends to be someone else, usually in a serious setting, where the impostor is doing some sort of damage
That surgeon who did Jane's tonsilectomy? Turns out, he was an impostor. He had a real job as an orderly in the hospital, but he was really good at snowing people and hacking computer records. They've got him locked up and his two wives are trying to bail him out.
by OsamaBinLogin January 27, 2009
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