be up to (one)

be up to (one)

1. To be something that one is responsible for or obligated to do. But it's not up to you to discipline my children! We live in this community, so it's up to us to improve it.
2. To be one's choice or decision. It's up to you—what would you rather do this weekend?
See also: up
Farlex Dictionary of Idioms.

be up to somebody


1 be somebody’s right to decide: Shall we have an Indian or a Chinese meal? It’s up to you. The decision’s not up to me.
2 be somebody’s responsibility or duty: It’s up to us to help people in need.
See also: somebody, up
Farlex Partner Idioms Dictionary
See also:
  • be up to somebody
  • it's all the same to me
  • hone in
  • be all one to
  • it's all (the) one to me
  • it's on me
  • the way the crow flies
  • it's not the meat, it's the motion
  • it strikes me that
  • not half bad