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A Sinse belongs to one of the lesser groups in school and usually has no friends. These are the people that you know sit in the back of the classroom plotting to kill everyone! They don't belong to any group, and they usually have a single style. They will wear the same clothes or something of the sort almost everyday. Sinse is an accronym for Single Individual Needing Social Experiece.
Matt: How was Math?

Aaron: It was cool but that sinse kid scares the s**t out of me..

Matt: Who?

Aaron: The kid who sits in the back everyday.
Sinse by The Highschool Group Creator December 17, 2009
Related Words

Common Sense Media 

A website where obsessive moms go to complain, scrutinize, and criticize all things found in the media
Before you allow Little Tommy to watch Spongebob, make sure you check it's rating on Common Sense Media!

Common Sense Media 

A piece of shit website where soccer moms who have children that want to play a game or watch a tv show or a movie refer to to see if it has positive messages, violence, sex, drugs, and of course the worst category ever CONSUMERISM. To get a good review it must go with the common sense media guidelines. They give all good movies 3 stars which sucks.
Teenager in high school : hey mom can I play fortnite and roblox kids games suck
Mom: let me check common sense media

Mom: no it’s 18+
Mom: it’s not stop treating like a baby I’m 17 curse you

the intent is to provide players with a sense of pride and accomplishment 

EA's justification on reddit for Star Wars Battlefront 2, claiming they weren't money hungry assholes, but the reply received over 600,000 downvotes.
EA: The intent is to provide players with a sense of pride and accomplishment for unlocking different heroes.
EA: *Gets over 600,000 downvotes*
EA: Shit.

Sinceriously 

1. The ability to speak freely, openly and honestly about anything; if you're going to say something, say it sinceriously.

2. To initiate any action while spreading as much good karma as possible.
When I say this I say it sinceriously.

I'm going to sinceriously raise as much money for charity as possible.
Sinceriously by Gingey87 January 17, 2015
Get your hands off of those kids SinSeer
SinSeer by Robby O'licious Bacon March 14, 2022
More from Urban Dictionary

proper lad 

a lad that is such a lad that he is a proper lad
person1:did you see bob
person2: ya he was a proper lad
Word of the Day on October 29, 2026
The number of years you are still sexually active
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
sexspan by Dr Kat April 21, 2022
Word of the Day on October 28, 2026
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.
You didn't get any napkins with your takeout pork fried rice? Womp womp.
womp by 175623226 November 3, 2011
Word of the Day on October 27, 2026
When your wife’s boyfriend let you sleep past 8pm 😎😎
Wife’s boyfriend: You have 5 more minutes
Me: Poggers!
Poggers by Just_Charles April 14, 2020
Word of the Day on October 26, 2026

Oblication 

A vacation, feeling more like an obligation, that involves visiting or staying with family.
So Joe where are you taking the kids for spring break vacation? We are going on an oblication to Boca to visit my mother-in-law.
Oblication by kimmerr May 5, 2011
Word of the Day on October 25, 2026
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