Si Robertson

Si Robertson is tied for the 2nd most powerful being in existence with Shaggy, and #1 being Gucci Berry. Si Robertson can create anything from anything. He can make a Barrett .50 cal out of 3 sticks,a couple of rubber band, a piece of gum, and some shrapnel. He also gets most of his power from his beard and his special ancient tea that he makes himself.

That man is a true Si Robertson.

by Somoki January 26, 2019

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Sis' Scum

A younger sister, who has a vagina, that assumes everyone of a binary gender.

Shut up Carrie, you Sis' Scum! Let my friend be who they want to be!

by Mafi- October 10, 2017

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si grand

A word to describe a person who is cool, attractive or superior, often in regards to the size of their penis.

The word bears grammatical genders as described in the rhyme below:

If you are an homme,
Then you say Si Grand,
If you go by she,
Then you're Si Grandi,
If it's not just you,
You're all Si Grandu.

Ryan doesn't skip leg day; he's really si grand. Me and him are si grandu.

by TotallyDefinitelyNotJames July 1, 2023

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lil sis

she was getting it installed on her car

yeeeaaaaaaaah, i got it on my car

by Kelly Stewart April 21, 2005

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Big Si

Reserved only for the saltiest of sea-dogs, the thiccest of gamers with all the hatred for minorities and none of the gamer fuel. He is a character known for gunning the monster energy drink and snorting creatine so he can get level 99 WC in RS3 (not even OSRS). He will offer you the monster energy drink when he first arrives, but will ALWAYS drink it all himself. He is the kind to stay up all night to complete their school assignment but end up jacking off 6 times exclusively to reruns of the first American Pie.

Wow did that guy just buy himself a negev? What a Big Si.

by ><><><><>< October 4, 2020

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