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feed off

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feed off (of) something

to eat something in particular customarily. (Of is usually retained before pronouns.) This creature feeds off fallen fruit. Mosquitoes seem to want to feed off of me!

See also: feed, off

feed off

v.

To be nourished, sustained, or fueled by something: The microbes feed off the decaying seaweed. The politicians are feeding off of the public's fear.

See also: feed, off