cous-sis

A cousin so close and tigh with you, they're like a sister. They always have you're back and you can tell them anything.

The sister you never had

"Do you have any siblings?"
"No but I got a Cous-sis"

by s_nizzy April 29, 2015

sis science

Feminine based pseudo science. Common beliefs with no real basis in science but are practiced and passed down like sacred old wives tales and "chick wisdom"

Also see bro science

My mom always told me that emu oil makes your hair grow. I have no idea if that true or just some old sis science.

by portiapotter September 7, 2020

si yang

A person who does not tolerate naughty things and is wholesome on the outside but is secretly curious about naughty things his friends know, searches it up on the internet and immediately regrets it.

John: "Yo johnny do you know what a rimjob is?"

Johnny: "Nope."

John: "Search it up then*

Johnny: "wtf is this"

John: " Hahaha you are just like si yang"

by Yourlover,.,.,.,.,, November 22, 2021

sis sue

Term of endearment from mother to daughter

“We’ll hello sis sue

by CocoaBeanz April 2, 2022

Lou Si

Used by the common 马丢 or a call for assistance for a teacher

He then cried: 'Lou Si. I don't know how to read this

by OMEGALULXD January 11, 2021

si party

The most annoying phrase known to man

"so you wanna do something tonight?"
"si party!"

by Scott Swanson February 12, 2003

cease si

To kill a black man.

CEASE SI HERDME! (I just killed a nigger, shall we begin to party?)

by The Moses June 24, 2004