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Omsim comes from the Filipino word "mismo".

Mismo means "you're right" or "I agree".
Man 1: I heard your dad left for some milk?
Man 2: Omsim, I don't think he'll come back.
Man 1: Omsim hahahahahahahhahah
Omsim by dredre26 April 10, 2022
Related Words
orsim OSIM orsm Omsim Orsi Orsini opsimath oreimo orsit orsome

osimosity 

(Noun) The state or condition of being awesome. Defined in a bogus mathematical theorem as:

Quality + Perception
-------------------- = Osimosity
Vulgar popularity

Not to be confused with animosity, or pretentiosity.
1. Lord Ossum of the Ossumites was an Ozymandian well known for his osimosity.

2.
Freddie:
I'm just a poor boy, nobody loves me...

Chorus:
HE'S-JUST-A-POOR-BOY/
NAMED-FREDDIE-MERCURY/
BOW-GASP-AND-QUAIL/
AT-HIS-OSIMOSITY!
osimosity by HMB August 2, 2004
An oreimo is a male that has a lot of girlfriends, but dumps them all to marry his sister.
"Don't end up like an oreimo."

"Look at that guy, he's an oreimo"
oreimo by Tobiichi Origami January 26, 2014
“Dude have you seen the account simpforjonossoff on tiktok? What a bunch of ossimp”
ossimp by Daddyissuessss March 16, 2021
The best Australian porn site out there

orsm.net
I spent 3 hrs on orsm.net laughed my ass off so hard I nearly busted a nut.
orsm by flat6 April 15, 2005
It is actually a combination of two words and it started in forum thread. It's when something is orgasmically awesome, orsm! It could be used in numerous ways, like a replacement for cool. Popular Internet chat and text messaging slang, since it's so short.
John "wow that was fantastic!"
Doe "yeah it was orsm!"

John "what an orsm day!"
Doe "sure is, let's take our orsm car for drive!"
orsm by wilburlikesmith September 11, 2013