green baize
/ˌɡriːn ˈbeɪz/noun
Baize of a green colour, used especially to cover tables for cards or gaming; (also) the fine worsted cloth (not properly baize, which is coarser) used to cover billiard and snooker tables; (hence) such a table. Also in allusive use.
Origin
Mid 18th century; earliest use found in John Hill (bap. 1714, d. 1775), physician and actor. From green + baize.