that's (someone's) problem

that's (someone's) problem

That is something someone else will have to deal with or figure out; that's not my responsibility or concern. A: "Janet said she's having a tough time getting this report finished on her own." B: "That's her problem, I've already got too much work of my own to do."
See also: problem
Farlex Dictionary of Idioms.

that’s ˈyour, ˈhis, etc. problem

(spoken, informal) used to show that you think somebody should deal with their own difficulties: If she doesn’t like it, that’s her problem, not mine!
See also: problem
Farlex Partner Idioms Dictionary
See also:
  • in place of
  • in place of (someone or something)
  • in place of somebody/something
  • keep up with (someone or something)
  • crack onto (someone or something)
  • be staring (something) in the face
  • be staring something in the face
  • in default of
  • in default of (something)
  • in default of something