British, American & Australian, American

to change the rules in a situation in a way that is not fair, usually in order to make it more difficult for someone to achieve something.

My boss is never satisfied. Whenever I think I've done what he wants, he moves the goalposts.

• need to have head examined
• need to have your head examined
• need your head examined
• need your head examining
• neither here nor there
• nerves of steel
• nest egg
• never a dull moment
• never darken door again
• never darken your door again
• never hear the end of it.
• never hear the end of it
• never live down
• never live something down
• never mind
• never mind someone
• never mind something
• never-never land
• never say die
• Never say die.
• never say never
• Never the twain shall meet.
• never the twain shall meet
• new ballgame
• new blood