chew the cud

bite off more than one can chew

To try to do too much; to take on or attempt more than one is capable of doing.

chew off

To reprimand, to scold

chew on

To consider, to ponder.

chew the meat and spit out the bones

To take in a great deal of information and selectively disregard some of it as invalid or inapplicable.

chew the scenery

To display excessive emotion or to act in an exaggerated manner while performing; to be melodramatic; to be flamboyant.

chew up

To ruin (especially land), by digging.

walk and chew gum at the same time

To do two normally trivial tasks at the same time; to exhibit basic competence or task-management skills.