off one's feed

off one's feed idiom
Have no desire to eat, have lost one's appetite, as in Even though Mom's gone only for a week, her absence puts Dad off his feed. Originating in the early 1800s and first used only for animals, this colloquial term later was applied to humans as well.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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