[quack grass] n [alter. of quick (grass), alter. of quitch (grass)] (ca. 1818): a European grass (Agropyron repens) that is naturalized throughout No. America as a weed and spreads by creeping rhizomes--called also couch grass, quitch, twitch, witchgrass
QUACK GRASS
Meaning of QUACK GRASS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012