Idea for a short story
A younger son invents a slogan and accompanying jingle for the failing family firm that is so instantly catchy that it fixes solidly in the head of anyone who hears it. At first this is a roaring success, people flock to the business, unable to ignore it. But very quickly it becomes a curse. With everyone ear-wormed by it, it is soon the most irritating thing in the culture. The business becomes a by-word for an annoying thing and as quickly as it became popular, it becomes unpopular again. Eventually the business fails but the slogan, being so catchy, never does and, for the rest of his life, the man who created it is dogged by it as passersby cannot help but absent-mindedly hum or whistle it, filling the air with the sound of his greatest success and most absolute failure.