Si

Having a sign language rap battle.

Tommy couldn't hear the shit that Warren was signing about him.

by will bitten December 21, 2016

Sis

Short for the word “sister” but also just an answer to any question ever.

Susan: “how was your weekend?”
Janet: “sis...”
Susan: “omg sis what’s the tea sis—spill!”
Janet: “sis!”
Susan “sis”
—and so on and so forth until Antichrist comes and the world is over

by Theworldisflat.edu August 3, 2018

sis

Short for sister, commonly used as a term of endearment to friends in urban new york/jersey areas

hey, sis, whats up

by Caroline Might Fine November 14, 2016

sied

suck it everyday.

perfect for awkward silence moments; a reason for people to hate you for.

person 1: sup foo?
person 2: ....
person 1: huh?
person 2: well um...
person 1: sied nub

walks away

by One Six One February 6, 2008

sis

Not meaning “sister”. Commonly used to refer to a close friend or bestfriend.

“what’s up, sis”

by kaitlyn pender January 24, 2019

sis

1) Short for sister
2) In the song Fuck the Pain Away by Peaches, SIS seems to stand for Stay In School...

My sis went to the movies with a scumball.

"Stay in school... Cause it's the best..."

by wxynot July 31, 2005

sis

Slang for sister

Me and my sis went to the movies.

by Thunderchild March 25, 2003