Sis

1. Short for “sister”
2. A term girls who downvote posts on UrbanDictionary call each other because guys call each other “bro” and they want to try to be just like them because “eQuAlItY”

“Hey sis.”
Ew don’t call me that, we’ve known each other for like 3 days.

by TheAlwaysCorrect1 January 12, 2023

lu si hamang

Standard issue ah beng argument when threatened meaning "who the fuck u think u r m8?!?1!1!!"

Normal human being: Yo man, you can't park on the disabled spot
Ah beng: Lu si hamang?!?!?
Normal human being: omfg how ableist of me

by lazykevin October 2, 2016

si yun

An idiot

Person: I can’t believe it!!!! She’s such a si yun.

by hebdkc July 25, 2022

Sis

Used to be sassy, sarcastic, SIS.
Sis is just such a cute word!!!

Sis-

Sis- NO
Sis that's so cute!

by t_xo88 September 27, 2020

Si Yang

A weird person who’s emotions can change very quickly, a fun and nice person who is extremely quirky and energetic, though they sometimes can come across as lame. People who have this name can be mean and violent at times but can also be empathetic and extremely kind. (Just be mindful of what you say to them.)

A Si Yang always knows how to bring the energy and craziness.

by Cloudsarecool November 21, 2021

sis

the girl version of “bro”, used as a form of address.

A (girl): wassup bro
B (boy): wassup sis

by MosesC November 7, 2023

Si

Is an abbreviation for Stupid Idiot, not to be confused with a nickname for someone called Simon.

You fucking Si; get 'ere now you Si

by SkiddyUnicorn29 July 25, 2022