SinSeer 

A Paedophile

Get your hands off of those kids SinSeer

SinSeer by Robby O'licious Bacon March 14, 2022

sinseriously 

Emphatically exhibits the sincerity of your seriousness. The classic use is to close a letter with it.

Dear Urban Dictionary:


Thank you in advance for considering “sinseriously” in your Urban Dictionary.

Were sinseriously to be included in The Urban Dictionary, that would make my day, perhaps even my week.

Sinseriously,
Cyprus Denton Fekks

sinseriously by Cyprus Denton Fekks February 19, 2010

Sinesed 

Being busted by/taken down by Gary Sinese's character, Mac Taylor, on CSI: NY.

"Did you watch CSI: New York last night?"
-"Yeah dude, that guy thought he was going to get away, but he got totally Sinesed!"

Sinesed by twomintomid February 22, 2009

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

Sineen 

Sineen is a girls name, Usually sineen is a girl who has an amazing personality and is extremely attractive, Usually being very tan with amazing black hair and eyes, she is extremely loyal and opinionated and very smart, A myth has been said that if your name is sineen you should date someone named Markus.

I just met Sineen and she is one of the most gorgeous girl i've seen inside and out!

I wish i had a sineen.......

Sineen by Mr.Easyyyyyyyy June 28, 2016

sinuses

Sinuses are in your face. They are near your cheekbones, nose, eyes and forehead. If you don’t blow your nose and just suck snot in, your sinuses will get clogged with snot.

Logan: Hey Bro I can’t come to see Callie and Stacey , I’m sick.
Lino: Why are you sick bro, what did you do?
Logan: My sinuses are clogged.
Lino: Of course they are. Damn right they are.

sinuses by Patrisha Lembert February 2, 2018