Sinfest 

The Bloom County of sex and religion.

Did you read that Sinfest strip? That 'Nique is a hottie in her beatnik beret.

Sinfest by Brian X July 1, 2003

Sinfest Pipeline 

A pipeline in which one begins with relatively progressive views except for their dislike of transgender folks, and ends with alt-right or even fascist-esque views.

Originates from the comic artist Sinfest, who began as a trans-exclusionary radical feminist, and devolved into a neo-Nazi.

Guy 1: It feels like yesterday Sam was super progressive aside from his transphobia, but now he's so hateful!
Guy 2: Sounds like he went down the Sinfest Pipeline.

Sinfest Pipeline by thedefinerrrrrrrrrrrr February 1, 2025

Sinestro 

Sinestro is a red head villain from the green lantern comics and series, he serves as the main villain.

Fear is the enemy of will. Will is what makes you take action; fear is what stops you, and makes you weak... makes your constructs feeble. - Sinestro ( in the live action Green Lantern movie )

Sinestro by crasher 1998 April 8, 2021

Right Handed Sinestro 

When having sex with somebody from behind, the receiving partner reaches back with their right arm and forcibly attempts to jam their fist up the ass of the giving partner. Named after Thaal Sinestro, the arch nemesis of the Green Lantern, the name is a reference to the fact Sinestro wears his power ring on his left hand so his right hand is free to penetrate people anally, as most supervillains often do with their free hands.

guy 1: I was having sex with this girl last night and I stuck it in her ass without telling her first.

guy 2: hahahaa what did she do?

guy 1: she wasn't happy so she gave me a right handed sinestro to get even.

guy 2: Oh man that sucks!

guy 1: ...I kind of liked it (._.)

Right Handed Sinestro by balooboo May 7, 2011

Sinestra

a person who is at once beautiful and fearsome. Often used to describe Dominatrixes, particularly Drag-Queen dominatrixes

oh my good, she's beautiful, but scary, she's the full Sinestra

Sinestra by Sinestra October 16, 2015

Sinfection 

A badass metal band from Moreno Valley, California. With drummer Alex Middleton, guitarist AlexSerna, guitarist Jeremy ??????(The Death Metal god), and singer Kevin Rivers.

Self-Induce, Sinfection is badass!

Sinfection by Nick December 13, 2004

sinester 

What people say when they can't spell "Sinister"

bruh, I just saw Sinester 2

sinester by DrSkelly July 8, 2016