that sudden dreadful realization that you are you, and only you, and stuck in your body and you're not omniscient and the universe is filled with other people just like that but you still can't live their lives and they can't live yours.

"which is like standing in front of the departures screen at an airport, flickering over with strange place names like other people’s passwords, each representing one more thing you’ll never get to see before you die" - as taken from the dictionary of obscure sorrows.
"Oh damn. I'm...I'm me. And I'm limited to stay here. Look at all these people whose shoes I'll never be able to walk in. Look at all the lives I'm never going to live."
"damn, that's some severe onism right there."
by PiggyStardust February 25, 2019
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a thought process, specifically one that takes hours on end.
by bootstrapbill January 22, 2007
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Its a sense of how little experience you have in this vast world. Sometimes we think we may have experienced a little more in our younger ages
He is tell about the onism in his biography.
by L0ky September 6, 2021
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1. Oppressive political correctness.
2. The tendency for activists to show excessive zeal in advocating their "righteous" causes, to the point of numbing their audience.

3. Jumping on the bandwagon of social movements in a lemming-like fashion.

There's been a relentless rise of right-onism since the '90s. Not to be confused with onanism, though functionally equivalent.
Man, I'm tired of being preached to by self-righteous vegans and environmentalists. They can take their right-onism and shove it.

After this Harvey Weinstein debacle, suddenly everyone's a feminist ! I'm sick of all this opportunistic right-onism.
by denumb October 26, 2017
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The name of an online forum within the universe of the indie video game 'YIIK: A Postmodern RPG'
"Hey dude, you checked Onism lately?"
"Yeah, Saw some cool shit"
by CosmicVoid February 18, 2023
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Its a feeling of how small you experience in this vast world. Sometimes we are thought that a little more we enjoy in our younger age.
He is told about onism in his biography
by L0ky September 7, 2021
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An average discordian who simps for Lum, a fictional character in the manga Urusei Yatsura. Onism is also known as "Not gay". Onism has a love with drawing sex pose, especially 69. She is known for drawing Lum in many styles. Onism also plays the popular Online game Roblox. Her username is Onihm789 (sometimes knowns as Cheerluv)
"😍😍😍😍 OMG IS THAT LUM X ATARU SECKS SCENE?!" Onism whenever she saw Lum and Ataru sex (canon)
"😡😡😡😡 SEND ME IT NOW!" Onism whenever someone doesn't send her the things she wants (sex, ships, etc...)
by Ryzenwoooooooooooo March 14, 2022
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