Quitch or Quitch'-grass, n.
(kwĭtch), Quitch'-grass, n. [Properly quick-grass, q. v., probably from its vigorous growth, or the difficulty of eradicating it.] (Bot.) Dog-grass or couch-grass; a species of grass which roots deeply and is not easily killed.
Full seldom does a man repent, or use Both grace and will to pick the vicious quitch Of blood and custom wholly out of him, And make all clean, and plant himself afresh. Tennyson.