SIWI

SIWI is an abbreviation, that stands for the phrase 'so I won it'.

While you are playing with your friend rock-stone-scissors, after score you may shout 'SIWI'

by PinkSourcy September 27, 2013

SiWi

One of the best chapters in the order of the Aleph Zadik Aleph, SiWi is short for Simon Wiesenthal AZA. Hailing from the cities of Palo Alto, Los Altos, and Mountain view, SiWi has often been reffered to as one of the powerhouses of the California Bay Area.

Originally founded in November of 2005, to this day Simon Wiesenthal AZA remains an amazing chapter.

Dude, SiWi is by far the best chapter!

by GuyAZA March 16, 2011

Siwy goose

Some one you is so silly that they deserve to be called a siwy goose. If you are ever called a siwy goose you should be honored. It is a big title so be grateful

Bestie: omg you are such a siwy goose.
You: thanks! You big ol' donut

by VICTOROHYEAAAH October 20, 2021

Siwi

A girl who likes throwing sims off a bridge after she takes screenies of them

Person 1: there's someone throwing sims off the bridge.
Person 2: oh, that must be siwi

by Trashxabril May 12, 2019