Well I could tell here what BDSM stands for. But wikipedia, as well as several other websites do a much better job at it.
“Save”, “Sane” and “Consensual”. These are the 3 keywords to any play. I would even say this also applies to sexuality outside the bdsm community. However, the keywords “Safe” and “Sane” are quite subjective.
Save
This means that the play or scene you do should be as safe as possible. However, part of the play is the seek the limits of one self. Seeking limits always implies risks, mentally or physically. But what “Save” really means is to make finding these new limits as save as possible. Eg. stop words, a knife to quickly cut ropes, a first aid box handy.
Sane
“Sane” probably even more subjective then “Save”. Sane by who’s standards? is the question that comes to mind. I think the simple answers is “sane as defined by the participants”. One might argue that the practices being “legal” according to the local law is also a part of being sane.
Consensual
Now this is easy on the negative part: If there is no consensus, there is no play. I think everyone can agree upon this.

SSC by the way stands for Safe, Sane, and Consensual.
Safe – meaning you should know those you involve yourself with. And have a “safe word(s)” in case things start to go to far for you.
I have always read and heard others use Safe Sane and Consensual.
By: Arianna on March 2, 2008
at 4:00 pm
There is also RACK
Risk
Accepted
Consentual
Kink
This is becoming more widely used than SSC, since as you said, Safe and Sane are purely subjective.
By: Belle on March 18, 2008
at 5:03 am
Thanks.. I heard about RACK once before, but at a wrong moment to investigate it further. It usually is when people come to look over your shoulder *grins*
By: duncanrust on March 18, 2008
at 11:25 am
R.A.C.K is actually Risk AWARE Consensual Kink
By: Desert Dweller on September 23, 2008
at 4:22 am