Bumpkin often reflects a stereotype and might offend. Use carefully. He didn't want to be labeled as a bumpkin just because he grew up on a farm.
Pro Tip 2/3
Informal Speech
Bumpkin is informal and more common in spoken language than in formal writing. During casual conversation, someone joked he was a bumpkin for not using a smartphone.
Pro Tip 3/3
Negative Connotation
The term can be derogatory, implying a lack of intelligence or culture. The city folks viewed him as a simple bumpkin, although he was quite clever.