s.i. 

to be
derived from the latin "si" meaning "if"
alternative meaning: stupid idiot
as in brother-in-law to be ... if the stupid idiot ever proposes

The usher is the groom's brother-in-law s.i.

s.i. by mother-in-law s.i. September 1, 2018

(s.i.) 

when text messaging, it is used for the idiots who don't understand that you're being sarcastic; means "sarcasm implied," and is often used at the end of a text message.

Janet: "Do you think Miguel was being serious?"

Miguel's text: "yeah i'm really excited to see you too (s.i.)"

Ted: "Of course not, he even put 'sarcasm implied' in the text! You must be really dumb"

(s.i.) by upsidedownchoking December 3, 2009

S.I. 

A Smelly Indian

Smelly Indians, or people with Turbans with unreal stench.

Manavpreet and Harpreet are such S.I.'s

S.I. by automatic.armadillo.42 May 14, 2022

S.I. 

Smelly Indians

People from the country of India or Punjab who reek horrible stench.

Especially people with turbans.

Manavpreet and Harpreet are such S.I.'s.

S.I. by automatic.armadillo.42 May 14, 2022

S.I.B.W 

Strong Independent Black Woman

Those girls are definitely S.I.B.W.

S.I.B.W by purpledinosaur345 November 3, 2011

S.I.V.A.C. 

Self-inflicted Victim Addiction Complex: A form of psychosis. Someone who is addicted to getting attention and pity by always being a victim, thus manifesting their inflictions by self-induction i.e. creating problems that only exist through suspicion, paranoia, and hypochondria, These problems are usually brought about when such a person has created a problem or infliction on another person in order to distract attention from their wrong-doings.

I really felt sorry for Keith until I saw what he had done to all of his ex's. Then I realized he suffers from an extreme case of S.I.V.A.C..

S.I.V.A.C. by Cyberobotic May 13, 2008

S.I.B.K. 

Super Itchy Balloon Knot

I didn't have toilet paper to wipe my sh*t ridden a*s so now I have a serious case of S.I.B.K.

S.I.B.K. by Jasper LaPrizrak March 26, 2022