on one's best behavior
American Heritage Dictionary of Idioms:
Top
on one's best behavior
Also,
on one's good behavior. Very polite, as in Mother told the children to be on their best behavior during Grandma's visit, or The whole staff were on their good behavior while the client inspected the premises. [Late 1600s]
Related Videos:
Top
on one's best behavior
Post a question - any question - to the WikiAnswers community:
Copyrights:
American Heritage Dictionary of Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Company. All rights reserved.
Read more