Or rather a buzz phrase. Mollie Hemingway:
A dog whistle is, according to Wikipedia, “political messaging employing coded language that appears to mean one thing to the general population but has an additional, different or more specific resonance for a targeted subgroup.”
Saying that Hillary Clinton lacks the physical and mental stamina to take on ISIS [as Donald Trump said in his speech last night] is literally saying the thing that supposedly needs to be dog whistled as a supersecret message. It can’t be secret, coded messaging when it’s the thing he says!
Good point, Mollie!