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 sally Fuck

This is when you dig up a little girls body and have dirty dirty sex with her neck.
"Dude, we stopped down to the graveyard last night and got our sinister sally fuck on".
by Big feces May 16, 2008
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Sinister Stanley

When a man marries a woman, and proceeds to perform bedroom antics with his wife's sisters, because this guy is void of any kind of moral compass, and/or is just a complete douchebag.
Girl - "I can't date that dude, he's such a Sinister Stanley!"

Girl - "Did you hear about Dave? He totally did a Sinister Stanley on his wife".

Man - "I have so much respect for Brian. He Sinister Stanley'd the shit out of his wife!".
by DirtyDave2.0 August 13, 2022
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Sinister Family

The sinister family is the worst fucking family ever fuck you host
The sinister family is the worst fucking family ever fuck you host
by daddy124123 March 07, 2021
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Sinister 6

a discord groupe with more lore than star wars !
"Sinister 6 VII already " "why is muzfan in the sinister 6"
by Frightful 6 May 10, 2022
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Sinister gamer

Derived from shield heraldy. Sinister means from the left. A sinister gamer is a left-handed gamer.
As a sinister gamer, I tend to be more of a pc gamer than a console gamer.
by Mr. Sinister February 09, 2021
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Sinister Doily

Some one who is being rude, unattractive or obnoxious.
"Wow, did you see that guy wearing pajamas at the mall?"
"Yeah, what a sinister doily."
by Nicolioli June 15, 2007
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