blue-light special

blue-light special

A brief discount or sale. The phrase refers to the use of flashing blue lights to indicate sudden, brief sales in the department store Kmart. Primarily heard in US. I wonder what today's blue-light special will be. It never seems to be for anything I actually need!
See also: special
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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