Cud

n.
  1. That portion of food which is brought up into the mouth by ruminating animals from their first stomach, to be chewed a second time.
  2. A portion of tobacco held in the mouth and chewed; a quid.
  3. The first stomach of ruminating beasts.
    4. To chew the cud ,
    to ruminate; to meditate; used with of; as, to chew the cud of bitter memories.