If you refer to someone as a hillbilly, you are saying in a fairly rude way that you think they are uneducated and stupid because they come from the countryside.
英漢詞典釋義
n.
<美>鄉(xiāng)巴佬;土包子
She belted out ballads and hillbilly songs one after another all evening.她整晚一個(gè)接一個(gè)地大唱民謠和鄉(xiāng)村小調(diào)。
英英詞典釋義
Noun
1. a disparaging term for an unsophisticated person