No, it's not the band that sang "More Than A Feeling." A Boston rocker is a type of American rocking chair from the 19th century. The rocker has a seat that curves down at the front, a decorative panel on a high spindled back, and a wide top rail. It's also the type of chair that many university shops sell, embossed with their school's logo. They might seem kind of granny, but they're pretty good at moving to and fro.