在英语里，“邻家女孩”的表述就是很直白的girl next door。或者，“邻家女孩”这个表述就是从英文里翻译过来的?
Every guy may have his specific girl-next-door prototype, but in general, girl next door is cute and sweet, usually makes a really great friend, she may be very attractive, and is modest about it.
Picture your sister's best friend from when you were kids. In your mind she'll always be that 10-year-old cutie who played with you in the park. Only, when you catch up with her 10 years later, she's still a cutie, but all grown up and had become someone you can trust and connect with on so many new levels.
Similarly, she could be a friend's cousin whom you met at family occasions over the years. Or even a new employee at work who is shy and unassuming, but still gives you that "she seems so nice, I'd love to talk to her" feeling.