Category: Abbreviations
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SAHM
Stay-at-home mom The proliferation of abbreviations is an index of the hyperkineticism of present-day life and communication. This old man is having a hard time keeping up.
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OTT
Internet abbreviation: over-the-top. Abbreviations divide into acronyms, initialisms, and truncations. Or so say I. See Acronyms, Initialisms, and Truncations and Acronyms, Initialisms and Truncations: Another Look
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TL;DR
Too long; didn't read. The hyperkineticism of present-day communication forces one to be pithy, which is good in many contexts. The downside you already know about.