SI

Short for Survival Instinct - the ability to know what to do to stay alive.

His SI stopped him from committing suicide.

by Reality Unearthed March 24, 2023

si ling

best school in woodlands singapore
meh toilet

Theres a primary school called si ling primary school???

by randomguyfromwoodlands December 19, 2023

sis

used if mad at someone or you are spilling tea

“hey rebecca, i just beat you in gamepigeon.”
“SIS”

“sis i have tea ☕️”
“SIS SPILL”

by anonymous November 28, 2018

Lao Si Ji

Lǎo sī jī (Old driver) 老司機— Chinese slang for someone who’s way too good at ‘driving’ — and by driving, we mean knowing a lot about sex, porn, hentai, lewd, and adult content.

- Oh man, didn't know you watch so much porn! You are a Lao Si Ji.
- Nah, Tom is the real Lao Si Ji. He is into hentai anime and stuff.

William: Are you doing your homework?
Ray: No.
William: What are you doing then?
Ray: Your mom.
Crowd: Ohhhh.
Kevin: Yo, Ray drives fast!

by itscalledthebird October 9, 2025

Sis Tank

A sis tank is the female version of a “bro tank.” Often defined by a loose fit with wide arm holes.

Rahsaan: “what are you wearing?”
Reagan: “a sis tank”
Rahsaan: “what?? That’s not a thing”
Reagan: “well what are bro tanks but for girls called?”
Rahsaan: “touché”

Rahsaan: “it’s so hot I’m glad I’m wearing my bro tank to the gym”
Hannah: “yess so glad I have my sis tank to wear”
Rahsaan: “happy for you too sis!”

by 17386789998212 February 6, 2021

SIS

Commonly used by fake friends to throw you off of there true intentions towards you , Usually said before they ask you for something

Hey SIS what u doing today? "I'm bout to go to the bank then get my nails done" Ohh I'm broke as hell .U got me till next week ?

by DAPPER DAN84 September 12, 2019

sis

This word is used on a girl usually by another girl if they are friends or know each other. This word can also be used in an offensive way. (this word is aave so don’t use it the wrong way if u white unless u wanna get clowned)

*walks into the room*
friend: “hey sis

“Sis thinks she’s all that”

by Dalingoudntkno614 August 10, 2023