edgeplay
https://en.wikipedia.org/wiki/Edgeplay
https://lgbt.wikia.org/wiki/Edgeplay
https://www.wikidata.org/wiki/Q3719118
A subjective term for activity (sexual or mentally manipulative) that may challenge the conventional S.S.C. (safe, sane and consensual) scheme observed in BDSM; if one is aware of the risks and consequences and is willing to accept them, then the activity is considered RACK (risk-aware consensual kink).
Note that edgeplay can be extremely dangerous and is not generally recommended.
edge play
fetish play
BDSM And Kink Terminology: A To Z
Dr. Harmony's Glossary of Kinky Terms