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."

Sinister Doily by Nicolioli July 13, 2007

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.

Sinister gamer by Mr. Sinister February 8, 2021

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

Sinister Family by daddy124123 March 7, 2021

Sinister Rat 

The greatest gaming youtuber of all time, according to award winning journalist GraciousLagrebr

I was just watching Sinister Rat the other day, love that guy!

Sinister Rat by Sinister Rat September 4, 2021

Sinister 6 

a discord groupe with more lore than star wars !

"Sinister 6 VII already " "why is muzfan in the sinister 6"

Sinister 6 by Frightful 6 May 10, 2022

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!".

Sinister Stanley by DirtyDave2.0 August 13, 2022

sinister slipper

Waking up 20 minutes before your roommate and nutting in their slippers so that the slippers are damp and sticky when they put them on.

My jackass roommate screamed when he put his nasty ogre feet into his sinister slippers this morning and it was hilarious.

sinister slipper by chunkycharizard October 27, 2023