Định nghĩa và ý nghĩa của "(as) phony as a three-dollar bill"trong tiếng Anh

If she does n't practice more, her acting will appear as queer as a three-dollar bill on stage, and she wo n't get the lead role.

In the past, some con artists used to sell phony products, convincing buyers they were valuable, but they were as counterfeit as three-dollar bills.