The phrase “I have been on my finest conduct” is often used to point that somebody has been performing in a very well-behaved or well mannered method, usually so as to make a very good impression or keep away from moving into hassle.
There are lots of explanation why somebody would possibly select to be on their finest conduct. For instance, they might be in a state of affairs the place they should make a very good impression, resembling a job interview or a primary date. They might even be attempting to keep away from moving into hassle, resembling when they’re round somebody who is thought to be strict or authoritarian.