the.com/spinoff

means A new show, product, or venture that branches off from an existing one, built around a character or idea that already proved it could carry weight.

from From the literal mechanical sense of 'spin off' — matter flung outward and separated by centrifugal spinning, a usage rooted in 19th-century industry (think spinning mills throwing off threads or byproducts). By the mid-20th century, American business writers borrowed it for corporate divestitures — a company 'spinning off' a subsidiary into its own entity. Television picked it up not long after, applying the same logic to a side character spun out of a hit show into their own series, carrying the parent's momentum but none of its guarantees.