From Longman Dictionary of Contemporary Englishprivate member's billˌprivate ˈmember’s ˌbill noun [countable] PPPa law introduced to the British Parliament by a Member of Parliament who is not a minister in the government
Examples from the Corpus
private member's bill• It was reintroduced in early 1974, again as a private member's Bill but with government backing.• The concession served to fend off a ban that might have been imposed under a private member's Bill.• A private member's bill to effect this change was brought forward in late February, 1925. 