Therefore, a chart-topper may be anything from an "insiders' pick" to a runaway seller.
Retailers said fragrance, which several department stores have promoted heavily this season, was a runaway best seller.
Manufacturers said there was no way to predict accurately which toys on the market would become runaway best sellers.
The original version of the book sold decently, but was not a runaway best seller.
Its successor, called a bunting jacket, became the company's first runaway best seller in the early 80's.
"Jaws" was a runaway best seller for beach reading.
The book is such a runaway best seller that only about 25,000 of the 470,000 copies printed remain on the shelves.
In its German edition, it was a runaway best seller.
The Pope, of all people, writes a runaway best seller.
Banned in Britain, the book became a runaway best seller elsewhere.