
1) BDSM terminology
Found on
https://www.crosswordclues.com/clue/edgeplay

In BDSM, edgeplay is a subjective term for those types of activity (either sexual or mental manipulation) that may be considered to be challenging the conventional or traditional `S.S.C.` (safe, sane and consensual) creed; if one is aware of the risks and consequences then the activity(ies) would be considered RACK (Risk-Aware Consensual Kink). .....
Found on
http://en.wikipedia.org/wiki/Edgeplay

SM play that involves a chance of harm, either physically or emotionally. Because the definition of edgeplay is subjective to the specific players (i.e., what is risky for me may not be as risky for you), there isn't a universal list of what is included in edgeplay. However, there are a few forms of play which almost always make the cut, including ...
Found on
http://en.wikipedia.org/wiki/Glossary_of_BDSM

A term for BDSM practices that are considered at the edge, inherently more risky, or debated within the community. Included are: breathplay, choking, knifeplay, play peircing, bloodplay, fireplay, gun play, consensual nonconsent.
Found on
http://rekink.com/guides/kinks/
No exact match found.