Move the goalposts
"Move the goalposts" is an idiomatic expression used to describe the action of changing the criteria or conditions of a discussion, argument, or situation in a way that makes it difficult for the other party to succeed or meet the original expectations. It derives from the image of a sports referee physically shifting the goalposts on a field, making it harder for players to score points. In a metaphorical sense, when someone moves the goalposts in a debate or negotiation, they are altering the terms of the discussion or the standards of success after the fact, often unfairly or arbitrarily, to suit their own agenda or to avoid conceding defeat.
This tactic can be employed intentionally or inadvertently in various contexts, including politics, business, personal relationships, and everyday interactions. When someone moves the goalposts, it can frustrate and undermine the efforts of others who have been working towards a specific goal or outcome based on the initial parameters. It can also erode trust and credibility, as it suggests a lack of sincerity or willingness to engage in fair and honest discourse. Recognizing when someone is attempting to move the goalposts is essential for maintaining transparency and ensuring that discussions remain constructive and grounded in mutual understanding and respect.