Green’s Dictionary of Slang

supermarket conversation n.

[with no more intrinsic quality than the Muzak played in supermarkets]

(US black) empty, meaningless chatter.

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C. Welsh ‘Rev. of Trans-Sister Radio’ at HippoPress.com 🌐 With this concise explanation, we may conclude that the terms themselves are not all that strange, but the subject of gender-bending has yet to breakthrough to becoming acceptable supermarket conversation.