SM
also known as SM, S/M, S&M
Abbreviation for the sadism-and-masochism component of the BDSM umbrella.
Definition
Expanded form: Sadomasochism
SM names the erotic exchange of intense sensation, often but not always through impact, restraint, or endurance. Historically the term predates BDSM and remains in wide use as its own descriptor.
Discussion
SM appears in older community literature and in the names of long-standing organisations.