The idiom "piece of work" is used to describe someone or something that is exceptionally skilled, talented, or successful in a particular task or area. It can also be used to describe an artwork or something that has been meticulously crafted or designed.

The idiom "catch up" generally means to become current or up-to-date with something, such as events, news, or information that has previously been missed or neglected. It can also mean to close a gap or difference between oneself and someone else in terms of progress or achievement.

The idiom "ring fencing" means to create a physical or psychological barrier around something or someone, to protect it from external threats or influences.

The idiom "off the hook" is used to describe something that is out of control, unpredictable, or wild. It can also be used to describe something that is exceptional, excellent, or top-notch.

The idiom "bird of passage" refers to someone who is temporarily passing through an area or situation, but does not have any permanent ties or connections to it.