eat in

eat in idiom
Have a meal at home, as in Are we eating in tonight? [Colloquial; second half of 1900s] Also see eat out, def. 1.

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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