not worth the paper it's written on
成語所屬單字paper
not worth the paper it's written on — 慣用語
1. (of a contract, promise, or document) so unreliable or unenforceable that it has
1.慣用語
釋義
毫無價值；形同廢紙
(of a contract, promise, or document) so unreliable or unenforceable that it has no real value.
例句
The minister's promise turned out to be not worth the paper it was written on.
Without both signatures, this contract isn't worth the paper it's printed on.