Even after years working in the city, his colleagues still treated him like a farm-boy with no sense of fashion.

farm-boy 是由 farm（农场）和 boy（男孩）组成的复合名词，字面意思是"农场男孩"，用来指代"乡下男孩"或"农村出身的年轻人"，常带有缺乏城市生活经验的隐含意味。