What does no moaning of the bar stand for?

The phrase "no moaning of the bar" refers to a principle in the context of legal practice, particularly in relation to the expectation of professionalism and decorum among legal practitioners. It suggests that lawyers should not complain or express dissatisfaction about their work or the legal profession in a public setting, such as a courtroom or bar association. Instead, they are expected to maintain a positive and respectful demeanor, upholding the integrity of the legal profession.