Wiktionary
alt. A regular, typical boy, as opposed to a superstar. n. A regular, typical boy, as opposed to a superstar.
Wikipedia
The boy next door is an archetype of storytelling. He is often invoked in Western contexts to indicate wholesome, unassuming, or "average" masculinity. A boy next door may serve as a love interest for a female protagonist who lives near by.
"Boy Next Door" is the fifth single from British R&B artist Jamelia and the fourth and final single from her debut album Drama. "Boy Next Door" is Jamelia's smallest hit, missing the UK Top 40, peaking at #42 and spending only two weeks inside the Top 75. The version released as a single was a slight remix to the version that appears on the album and is also slightly shorter in length.
Usage examples of "boy next door".
The boy next door has stopped crying, but Steve can still hear the girl, sobbing in big, watery hitches.