feed off (of) (someone or something)

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feed off (of) (someone or something)

1. Literally, to use someone or something as a source of sustenance. The kittens still need to feed off of their mother for a few more days.
2. By extension, to use something to one's advantage. These insurance companies are just trying to make money by feeding off our anxieties.
See also: feed, off
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

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
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
"The kind of cross-pollination that we get with people of different disciplines feeding off of one another--that's a direct result of the culture we have in New York," Kamen says.
Scientists suspect that activity on the Sun can on occasions go global, with eruptions on opposite sides of the Sun triggering and feeding off of one another.