country bumpkinA strongly insulting, informal term for someone seen as uncultured or unsophisticated. ไอ้ is a vulgar insult marker, often used for a male person but sometimes used more broadly.
TH: อย่ามาทำเป็นรู้ดี ไอ้บ้านนอก
EN: Don’t act like you know everything, you country bumpkin.