SI

Abbr. for 'stupid idiot'

As in Football Factory from 2004:
"Jog on, you si!"

by Nige Menzel June 11, 2007

Si

Yes

“Si”

by TwistyNoodles July 27, 2020

-sies

Suffix added to the end of almost every word. Used mostly by 40 year women talking to their children and/or dogs, or drunken college whores in a desperate attempt to sound more cute, less riddled with STDs and premature, substance induced age.

Ok, who wants napies?

Who's got tired little legsies?

by Ihateyouallsomuch July 31, 2005

sies

(suffix)

Dialect of UnaRocks added to the end of various words for no particular reason.

'Sies disease' is the propensity to become addicted to the suffix 'sies'

That car is awesome, wantsies!

I'm so hungoversies today

Would you like to go for some drinksies this evening?

I have the sies disease so badsies

by UnaRocks January 5, 2008

SI

Abbr. for "self-injury," also known as self-mutilation. Most common form is cutting, but may also include burning, bruising, skin-picking (excoriation), and other behaviors. There is no single cause for SI. SI is most common in women and tends to persist for years.

As a result of overwhelming anxiety, she turned to SI as a coping mechanism.

by rieux November 27, 2003

SI

stands for self-injury. Aka cutting, burning, etc. for emotional distress reasons

Person 1- Did you SI today?

Person 2- I haven't hurt myself on purpose in like a week.

by Injuried November 8, 2010

SIS

a genderless term much like "bro" or "dude"

you don’t have to be BFFS. You don’t really even have to know them. If she seem chill. then SISSSSSS is what they should be called!

JACK: *texts Jill*

“ SIS! You’ll never believe what popped up on Greg’s phone!!”

Jill: “Girl, SPILL!”

Jack: “Some HOE’S NAME! Do you think he is cheating on me?!”

Jill: “ SIS! YES! Leave his ass!”

****you can also use it in less dramatic scenarios****

by URB@NL3GEND March 4, 2020