SB meaning in Regional ?

South Boston is a densely populated neighborhood of Boston, Massachusetts, located south and east of the Fort Point Channel and abutting Dorchester Bay. South Boston, colloquially known as Southie, has undergone several demographic transformations since being annexed to the city of Boston in 1804. The neighborhood, once primarily farmland, is popularly known by its twentieth century identity as a working class Irish Catholic community. Throughout the twenty-first century, the neighborhood has become increasingly popular with millennial professionals.

South Boston contains Dorchester Heights, where George Washington forced British troops to evacuate during the American Revolutionary War. South Boston has undergone gentrification, and consequently, its real estate market has seen property values join the highest in the city. South Boston has also left its mark on history with Boston busing desegregation. South Boston is also home to the St. Patrick's Day Parade, a celebration of the Irish-American culture and the Evacuation Day observance.

The headquarters of Reebok is in South Boston.