The recent United States political cycle has been using the term "dog whistle" a lot. From a recent Rolling Stone headline:
Trump's Assassination Dog Whistle Was Even Scarier Than You Think
And their article:
Stated differently: Trump puts out the dog whistle knowing that some dog will hear it, even though he doesn't know which dog.
I assume that the meaning is something similar to double entendre where a statement can be interpreted a few different ways. But why use "dog whistle", specifically? And where did the term first originate?
Best Answer
It appears to be an expression of the late '80s according to journalist Willian Safire, but its origin and common usage is mainly Australian from the late '90s. The allusion is to sheep-farming where a farmer uses a whistle which is audible only to a dog. By analogy, a specific political message can be registered only by those to whom it is directed:
Dog-whistle politics:
Dictionary.com dates its origin in the second part of the '90s:
Dog whistle:
The Taegan Goddard's Political Dictionary defines the expression "dog-whistle politics" as:
According to the following extract from www.macmillandictionary.com/buzzword the expression has Australian origin where it was popular from the late '90s and was exported to the U.K. in 2005: