sinistery 

Countable noun: An act that is sinister. Countable plural form: Sinisteries

Used because sinisterness is just fugly in the countable sense.

"They got a $4B payout‽" "Yes, that sinistery of <private equity firm> is unmatched in all their history!"

Kryin Bemp ran for governor while serving as secretary of state. They improperly purged voter roles and engaged in other sinisteries, ensuring their win.

sinistery by Unringard November 4, 2022

sinister slash 

When you rip open the vagina with two hands so wide you can crawl inside.

I will sinister slash your girlfriend.

sinister slash by Superslickwillyg January 24, 2014

Sinistrous Mistress 

A sexy, left-handed woman. Also known as a sinister sister.

She's left-handed and a little bit sinister. She's a sinistrous mistress.

Sinistrous Mistress by yo-yo-ma-ma March 22, 2011

sinister minister 

weed, ganja

yo dude i brought a baggy of sinister minister

yeah cheers

sinister minister by Superhanzz January 2, 2011

sinistrophobia 

is the fear of all things to the Left.

a-"quick! look at that ball on your left!"
b-"i cant, i have sinistrophobia!"

sinistrophobia by iheartmarie May 29, 2010

Sinister Sister 

A sexy, left-handed woman. Also known as a sinistrous misstress.

The English word sinister comes from the Latin word "sinistre", meaning "left". So, since she's sexy and left-handed, she's a sinister sister.

Sinister Sister by yo-yo-ma-ma March 22, 2011

Sinistar 

A mid-1980s arcade game where you pilot a ship through an asteroid field mining for bombs to use against a super-demonic space robot called Sinistar, which is being built by swarming drones and defended by fast-firing tanks. Once Sinistar's construction is completed, he starts threatening and taunting you ("Run, Coward!") and makes a beeline to your sorry hide. The stress level involved gets ridiculously high. It is/was quite possibly the toughest arcade game in human history.

Beware, I live.
I hunger.
AAAAAAAURRRRRRRRGGHHHAAAAAAA!!!

Sinistar by Paul Wartenberg December 10, 2003