feed on

Verb

feed on (third-person singular simple present feeds on, present participle feeding on, simple past and past participle fed on)

1. (literally) Of an animal, to take as food, to obtain regular nourishment.
   • Animals that feed on the leaves of the trees.
2. (figuratively) To obtain energy or strength from something.
3. (derogatory, figuratively) To live at the expense of another person; to freeload.