What difference does it make?

What difference does it make?

Will the given thing, decision, or situation actually matter or cause any appreciable difference? A: "Please make your bed in the morning before you leave for school." B: "What difference does it make? I'll only mess it up again each night when I go to bed." A: "So I decided to paint the room red instead of orange—what difference does it make?" B: "Because the red doesn't match with any of the furniture we picked out, you clod!"
See also: difference, does, what
Farlex Dictionary of Idioms.

What difference does it make?

Does it really matter?; Does it cause any trouble? What if I choose to leave home? What difference does it make? So Jane dropped out of the club. What difference does it make?
See also: difference, does, what
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • very little in it
  • come to nothing
  • amount to nothing
  • stand off from
  • stand off from (someone or something)
  • make (one's) bed (up)
  • make bed
  • make bed (up
  • make up (one's) bed
  • make up the bed