(it) doesn't matter

(it) doesn't matter

1. It makes no difference; that is not relevant or has no bearing (to or on what's being discussed). A: "Why do I have to go through these safety protocols every single time? I didn't come in contact with any hazardous materials!" B: "Doesn't matter. The protocols are there to keep everyone in this lab safe." A: "But I don't want to do my chores!" B: "It doesn't matter what you want! If you don't do your chores, you don't get to see your friends this weekend. End of discussion."
2. It is not worth your concern; don't worry about it. A: "Sorry I didn't call you back. I've just been so busy with work." B: "No worries, doesn't matter. I was just calling to see how you're doing." A: "Uh oh, I think I broke it!" B: "It's all right, it doesn't matter—we'll just go to the store and get a new one."
3. It is not worth your attention; forget about it. A: "Go ahead, what were you going to say?" B: "No, it doesn't matter." There's one other issue I wanted to mention. Actually, you know what—doesn't matter. It's getting late, so let's just wrap the meeting up for today.
See also: matter
Farlex Dictionary of Idioms.
See also:
  • difference
  • gift
  • dime's worth of difference
  • nod through
  • fail over
  • have (any/some) bearing on (someone or something)
  • have bearing on
  • not much to speak of
  • nothing to speak of