there's no law against something

there's no law against (something)

It is perfectly acceptable to (do something). Typically said in response to criticism of or a warning against some action. Why shouldn't I try to haggle with the waitress? There's no law against it. There's no law against returning something I've already worn. Stop trying to make me feel bad about it.
See also: law, no
Farlex Dictionary of Idioms.

there’s no ˈlaw against something

(spoken) used to tell somebody who is criticizing you that you are not doing anything wrong: I’ll sing if I want to — there’s no law against it.
See also: law, no, something
Farlex Partner Idioms Dictionary
See also:
  • there's no law against (something)
  • there's no law against it
  • haggle
  • haggle about
  • haggle about (something)
  • haggle over
  • haggle over (something)
  • dicker
  • every man to his taste
  • (all) well and good