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Nation of Sinister

A ROBLOX clan created by a guy named Kalavamo who didn't know any better.

The clan is now lead by a stupid guy who wants to make the clan grow.
Guy 1:Dude, I joined a clan named Nation of Sinister! They worship pumpkins!
Guy 2: Ew
by vivacapsuni May 13, 2020
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S.S.S. - Sinister Sexy Syndrome

A syndrome diagnosed to fictional characters. This syndrome identifies the villainous behavior of antagonists, anti-heroes, and other character types as the quality that makes them attractive. In simpler terms, villain bad and therefore hot.
person 1: how can you simp for that guy? he’s a murderer!

person 2: bro he’s got S.S.S. written all over him. i can’t help it.

person 1: what the hell is S.S.S.?

person 2: you don’t know what S.S.S. - Sinister Sexy Syndrome is?
by kaeyas.stepstool September 12, 2021
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sinister

A freeride mountain bike company who build frames for agressive riding.
I ride a Sinister mountain bike frame.
by Fullmer May 17, 2006
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sinister turmoil

A FNaF fan game created by an awesome team with a very manly and awesome leader named ANGUs GAMEs who are the new people working on the new and better version of said fan game that is about special versions of animatronics called Sinister and Prototype (and maybe more) attacking a person in a theme park who is trying to figure out what's going on and who the master mind behind it all is.
Hey guess what? Sinister Turmoil. Wait that joke sucked. Wait that wasn't even a joke. Shit I suck at jokes.
by The fish nish. January 2, 2018
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Sinister

Something or someone that would be considered "good". But in an extraordinary way.

A couple synonyms for example would be "awesome ", "phat"
"That guy's car was sinister!"
"I ate so much man, that food was sinister."
"She's so sinister, I'd do anything to get with that"
by DrewBlood67 December 18, 2018
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SinisterCreature

The most knowledgeable online user you'll ever meet online. God at se'ing/ref. Poor 'wancle' be running away, yet he emails them and they end up going broke.
Omg it's SinisterCreature run!
Imagine being as cool as Sinister...
Sinister is too op!
by EliteUser123222 October 17, 2019
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sinister

perceived evil usually caused by THC-induced paranoia.

True noun form: sinisterity

"The sinisterity is appalling."
"yo that car looks real sinister."
"shut up you're just torched... KEITH!"
by keith liquori June 27, 2004
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