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Research Science Institute. Insanely prestigious summer research program for rising high school seniors at MIT and CalTech. Practically impossible to gain admission.
RSI by nerdish January 2, 2005
Remove Surgical Instruments

Originally used by surgeons nearing the end of a surgery, this expression has become a reminder not to leave important things behind.
"Don't forget to RSI before sewing her up."

Hotel sign: "Please RSI before you check out!"
RSI by ElSombrero September 17, 2013
An acronym for Rapid Sequence Induction, an emergency medical procedure sometimes performed by paramedics prior to intubation on conscience patients. It is essentially a rapid anesthetization.
EMT: Resps are 6 chief!
Medic: Alright, we need to intubate. Is he still conscious?
EMT: Partially
Medic: Go ahead and set up for an RSI
RSI by pcbene January 9, 2008
Why are you asking for medical advice from RSIs?

{random strangers on the internet}
RSI by wle November 5, 2012
RSi - a small band from the Belfast area in Northern Ireland.

Currently un-signed, but have a manager.

Could be described as Space Rock or progressive
Kid one : Hey dOOd. Heard of RSi?

Kid two : No but my older brother gets it all the time.
RSi by mel2k7 January 28, 2007
Royal Sstein Institute

A global organisation of corruption, oppression and persecution. RSI has universal power over planet Earth. Ruled by the Sstein, who follows the Yllasic cult of forced religion.

RSI is enshrined in a total of 1,287,922 laws.
The RSI is closing in.

I have an opinion, unless it clashed with the RSI.
RSI by RSI creator December 9, 2008