Sillister 

Noun. One who is being extremely silly.

Why did you pull your pants down? You're a sillister.

Sillister by Frankenstein Smells June 30, 2010

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

Silvester

A dummm fine boy that's smart, loyal, trustworthy and caring. You'all always crave his presence. When's he's around you'll feel like your home because you can be yourself. Make sure you value him, you may never come across a boy that makes you feel so comfortable and loved. He makes you feel protected and likes to cuddle. He can get freaky too;)but while still being respectful. He has the best sense of humor by making kinky jokes. And the way he laughs will make your heart fuckin melt. You'll always find him taking a nap, playing games or on YouTube. His fine ass body, smile, his hair, you'll love it all. He's perfect. You can never get tired of a Silvester, he's the best person to be around.

That boy Silvester lookin sexy.👅

Silvester by Lil Betty123 October 5, 2017

SilMaster

Short for the two words "Silly Master." Or, depending on how you use it, it can mean Silly Masturbater. Mostly used while texting.

Ex 1:
"Laughing my fucking ass off, you're a silmaster at this game."

Ex 2: (Said by an Australian, or a British person.)
"Oi, get oveh he'e ye silmasta'"

SilMaster by NoobHammer May 11, 2021

sinister minister 

weed, ganja

yo dude i brought a baggy of sinister minister

yeah cheers

sinister minister by Superhanzz January 2, 2011

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

Shitlister 

1. (N) A person or group of people that are hated with such passion they are put on ones shit list.

2. (N) With enough passion to be put on one's shit list

Karen was being such a douchebag we all desided she was a shitlister

Shitlister by Kbas and Kodak September 28, 2009