litter on a stick n. roadside billboards, signs, and advertisements. (source: Double-Tongued Dictionary)
Further reading
Unwrap the name of a candy bar, and you just might find a story inside. For instance, one chewy treat found in many a checkout lane is named after a family’s beloved horse. And: 50 years ago in the United States, some Latino elementary...
Sean in New York City is curious about the expression the business end, as in the business end of a gun. It’s simply “the end of an object that fulfills its function or purpose,” such as the business end of a shovel, the business...
Smaller signs are referred to here (http://www.causs.org/) as street spam, vertical litter, bandit signs, snipe signs, utility pole advertising, stuff on a stick