Period sis

Some stupid shit a heart broken female made

Fuck that broke ass nigga

And that’s “period sis”

by @dubba June 6, 2019

little sis

To the older sibling: Bitch.

"Hey little sis, go downstairs and get my bathing suit out of my car.

by PWNED&not April 9, 2010

o si

A world that means "o really" in Spanish used commonly by Salvadorians in a sarcastic way

guy 1- just banged da grl i told i told u about
guy 2- y u lying
guy 1-na for real dude
guy2- oooooo siiiiiii jajajajaja

by ElonlyS0n1x September 4, 2007

SI TARP

Famous Admiral Ackbar saying: "It's a trap" --> si a trap --> si tarp!

Run, shell si coming with the banstick! SI TARP!

by EpleMOS February 5, 2003

sis i-

Before "and I oop-" there was "sis i-" basically when a bitch say some out of pocket shit that catch you off gaurd

James: *randomly while I'm eating* suck this pussy mama

Me: sis i-

by Toastedpocohontass July 9, 2019

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

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