Of Blessed Memory? I can never hope to keep up with people who are so incredibly broad-based in their use of acronmyms.

OBM - Honorifics for the dead in Judaism
Among the honorifics in Judaism, there are several traditional honorifics for the dead which are used when naming and speaking of the deceased. Different honorifics might be applied depending on the particular status of the deceased. These honorifics are frequently found on gravestones, on memorial walls inside the sanctuary of synagogues, in speeches, and in writing such as in obituaries.