poor white trash
/ˌpɔː ˌwʌɪt ˈtraʃ/ /ˌpʊə ˌwʌɪt ˈtraʃ/originally and chiefly US informal (derogatory )
noun
Poor white people of low social status, especially when regarded as uneducated or uncultured. In earlier use, frequently in the language of African Americans of the southern United States.
adjective
Of, relating to, or characteristic of poor white people of low social status, especially when regarded as uneducated or uncultured.
Origin
Early 19th century. From poor + white trash. Compare slightly earlier poor white.