hillbilly
noun [ C ] US old-fashioned disapproving uk/ˈhɪlˌbɪl.i/ us/ˈhɪlˌbɪl.i/
（住在山区的）乡巴佬，土包子
a person from a mountainous area of the US who has a simple way of life and is considered to be slightly stupid by people living in towns and cities