Who needs it?

Who needs it?

It is not necessary or important. The thing that "it" refers to is typically mentioned immediately before this phrase. I don't care about that job. Who needs it? I'll get a better job in a week. No, I don't belong to a gym. Who needs it? I get all the exercise I need lifting heavy boxes all day.
See also: needs, who
Farlex Dictionary of Idioms.
See also:
  • joke is on
  • duckling
  • an ugly duckling
  • like Grant took Richmond
  • have a Chinaman at (one's) neck
  • have a Chinaman on (one's) back
  • carry a Chinaman on (one's) back
  • a woman's work is never done
  • blow (someone or something) to kingdom come
  • blow someone/something to kingdom come