there's no law against it
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.
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there's no law against itused in spoken English to assert that you are doing nothing wrong, especially in response to an actual or implied criticism. informal
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