SI

Abbr. for 'stupid idiot'

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

by Nige Menzel June 11, 2007

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

SI

1. Spanish for "yes."
2. Misspelling of "is."

1. "I suck." "Si."
2. "NO YUO FAGOT A COMPUTAR SI NOT A HAT!"

by Dj gs68 September 22, 2003

SI

self-injury

I haven't SI'd in two weeks.

by Anonymous Ex-cutter June 21, 2003

SI

SI is the abbr. of stupid idiot , although it can also be used in a way in which it means mug

I.E. billy you fucking si, si does not mean sigh which means you bore.

by jake lowe February 11, 2008

SI

A term often used when talking about mental health treatment meaning suicidal ideation or suicidal thoughts

My SI had been chilling lately

by Bitchbotch June 22, 2019