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blue-rinse

[bloo-rins]
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adjective
  1. of, for, or composed mostly of elderly women: the blue-rinse matinee audience.

Origin of blue-rinse

First recorded in 1975–80; so called from the bluish tinge produced by certain rinses used on gray hair
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018