on one's good behavior
IdiomsExample Sentences
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One cannot always be on one's good behavior," Flossy murmured; "and, as long as one looks nice and gives him a word or two now and then, just to keep him in good-humor——" "So long, you think, he will be kind to you?
From Project Gutenberg
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
