What does MSS stand for?

Member of the Same Sex

This definition appears very rarely and is found in the following Acronym Finder categories:

Slang/chat, popular culture

Other Resources:

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Mechanical Support System Mechanical Systems Simulation Mechanically Separated Species Mechanized Specification System Medical Service Specialist (USAF) Medical Staff Services (various organizations) Medical Student Society Medical Support Services Medical Surgical Supply Medium Sun Sensor		Member Satisfaction Survey (various organizations) Membrane-Spanning Segments Memphis Soaring Society (aviation) Merit System Services Merrimac State School (Gold Coast, Australia) Message Storage Server (Avaya) Message Support Subsystem Message Switching System Meteorological Satellite Subsystem (US DoD) Meteorological Sounding Systems

Samples in periodicals archive:

In turn, service members are banned from saying they are gay or bisexual, engaging in homosexual activity or trying to marry a member of the same sex.

Gates: No change soon on `don't ask, don't tell'

If a sensitive boy or young man has affectionate feelings for a member of the same sex in any context whatsoever, they will each say, under rigid binary thinking, that he is condemned--by heredity, genes and brain chemistry on one side, and by original sin and predestined total depravity on the other--to go over to a completely homosexual lifestyle in an urban gay ghetto and stay there forever.

Beyond the binary