Cud /(kŭd)/

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.
    Whatsoever parteth the hoof, and is cloven-footed, and cheweth the cud, among the beasts, that shall ye eat.
    — Levit. xi. 3
  2. A portion of tobacco held in the mouth and chewed; a quid. [Low]
  3. The first stomach of ruminating beasts.
    Chewed the thrice turned cud of wrath.

Phrases & Compounds

To chew the cud
to ruminate; to meditate; used with of; as, to chew the cud of bitter memories.