S/M

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S/M

or S-M
abbr.
sadomasochism
References in periodicals archive ?
The Sherman-Morrison formula (S-M shortly) gives the basic relationship between the inverses[ M.sup.-1] and [A.sup.-1] (for more details see, e.g., [1]):
Serena-Maneesh S-M Backwards (Smalltown Supersound)
S-M and S use the same accounting firm, and have for the past 52 years.