Moving the goalposts or shifting the goalposts is an idiom which means changing the terms of a debate or a conflict after it has started.[1]
The phrase describes changing the target or goal of a process. In a dispute or a competition, the idiom explains what one side does in order to gain advantage.[2]
This phrase comes from sports that use goalposts, such as football.[2]
In 1978, the Washington Post published the phrase, quoting the CEO of American Airlines who said, "'They keep moving the goal posts."[1] In Britain, the earliest known published use was in 1987.[2]
The idiom identifies a kind of logical fallacy. In an argument, when evidence is presented in response to a specific claim, it is "moving the goalposts" when some other evidence is demanded instead.[3]
In other words, after an attempt has been made to score a goal, the goalposts are moved to exclude the attempt.[3] The problem with changing the rules of the game is that the meaning of the result is changed too. It counts for less.[4]
The tactics of bullying behaviour include moving the goalposts. This means setting objectives which subtly change in ways that cannot be reached.[5] In workplace bullying, shifting the goalposts is a conventional tactic.[6]