eat (something) off

eat (something) off

To erode or wear something away. A very corrosive substance must have eaten off this part of the pipe.
See also: eat, off
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

eat something off (of) something

 and eat something off
to erode something off a larger part. (Of is usually retained before pronouns.) The acidic rain ate the finish off the steeple. The acid ate off the finish.
See also: eat, off
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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