tumble grass

/ˌtʌmbəl græs/

Definitions of tumble grass

1. noun

   North American grass with slender brushy panicles; often a weed on cultivated land
   synonyms: Panicum capillare, old witch grass, old witchgrass, witch grass, witchgrass

   type of:

   panic grass

   any grass of the genus Panicum; grown for grain and fodder