SI

Means self insert. The character you use and identify yourself to have sex with your anime waifu.

-I'm going to write a fanfiction between my SI, Jackard Bigchub Maximus, and Sagiri-chan.
+Do it elsewhere. Disgusting.

by FancyDuck December 3, 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

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

A commonly used word, mostly by females. Referring to a close friend or a shortened version of “sister”. Some could say this is “basic” and “overused” by more than half the internet. Someone who would use this word would probably:
1. Watch Shane Dawson
2. Say “tea”, “love that”, “queen” a lot
3. Make jokes about hating themselves
4. Bring up their depression randomly
5. Get into online fights in random discord servers
6. Wear thrift clothes
7. Have “aesthetic” things
8. Be sensitive
9. Feel the need to drink Starbucks even though they don’t like it
10. Wear adidas and giant hoodies
And the list could go on...

“Hey, sis! How are ya?”
“Omg! Spill the tea, sis.”
“I got some tacossss sisss:D”
“Sis, just stop.”
“Sis, you ain’t cool.”
“Hunny, you needa chill, sis...”
“Sis got some issues”
“Finna slap a bish, sis angry>:(“
“Shhh! Sis imma kill you”

by XxcloudyxX February 15, 2019

cute si daniel

attractive in a pretty or endearing way.
Napaka cute ni daniel sobra Jusko ang cute nyaaaa sobraaa

Cute si daniel

by Salamadayoo October 5, 2021

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