Be on one's best behavior meaning in English

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Definition

behavior (US), behaviour (UK): conduct, manner of acting noun
to be on one's best behavior: to act, to conduct oneself in the best way possible idiom
Everyone should be on their best behavior when the queen comes to visit: no practical jokes.

Examples

  • "Lack of sleep leads to irritability, poor behavior and trouble with relationships, especially among children and teens."
  • "Needless to say, he is our most valuable client. Everyone needs to be on their best behavior."
  • "I'm so sorry about Philip's behavior!"
  • "I'm sure you will join me in condemning this unacceptable behavior."
  • "Is Jean actually violating any of the behavior guidelines of the company?"
  • "Needless to say, everyone needs to be on their best behavior."
  • "He needs to learn that this sort of behavior isn't acceptable in a business environment."
  • "This is, obviously, unacceptable behaviour."
  • "Luna : Now Philip, Susie has made a very serious accusation about your behavior, which she considers inappropriate."
  • "Though I'm deeply disturbed by your behavior, I am committed to helping you become a less disgusting human being through my life coaching."
  • "At first, I was puzzled by Mr. Oléré's behavior."
  • "Susie : We need to issue a publicity statement that denounces Ivana's behavior, but also shows we are helping her through this difficult time."
  • "Brent : That's disgraceful behavior, Enriqué."
  • "Narrator : Bruno never forgot this remarkable first encounter, and spent his years at University studying animal behavior and linguistics."
  • "Nicola : So, to summarize, you never know what shares will do because human behavior is unpredictable."
  • "Bruno : Well Brian, though my Japanese is rusty, Masaki said something about Icarus' behavior that might be a clue."

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