a weight off your mind

a weight off (one's) mind

The relief felt after sharing what one is thinking or feeling with others, or upon no longer having a particular problem. Having a night out to talk over my problem with my close friend helped me get a weight off my mind. I finally completed my tax return for this year. That's a weight off my mind!
See also: mind, off, weight
Farlex Dictionary of Idioms.

a weight off your mind

or

a load off your mind

If you describe something as a weight off your mind or a load off your mind, you mean that a problem that you were previously worried about has now been solved and you are no longer anxious. It's a real weight off my mind, knowing I have a job to go to. Knowing that the problem can be fixed — it's such a load off my mind. Note: You can also say that something takes a weight off your mind or takes a load off your mind. It was such a relief to find a good school for the kids. It took a real weight off my mind.
See also: mind, off, weight
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • a load off (one's) mind
  • a load off mind
  • a load/weight off somebody's mind
  • a weight off (one's) mind
  • load off one's mind, a
  • be a load off (one's) mind
  • be a weight off (one's) mind
  • be a weight off (one's) shoulders
  • be a weight off your mind
  • be a weight off your shoulders