poor white folk
/ˌpɔː ˈwʌɪt fəʊk/ /ˌpʊə ˈwʌɪt fəʊk/noun
As a mass noun or in plural Originally in the language of African Americans of the southern United States: poor white people of low social status, especially when regarded as uneducated or uncultured.
Origin
Early 19th century; earliest use found in Port Folio. From poor white + folk, after white folks.