blue-light special(redirected from a 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.