1. young men who spend time at beaches, typically engaged in swimming, surfing, or socializing
Usage: plural form; informal; often associated with a carefree, leisure-focused lifestyle
2. members of The Beach Boys, an American rock band famous for surf rock and pop music
Usage: proper noun usage; capitalized when referring to the band

Examples

• The beachboys rode the waves all afternoon.
• A group of beachboys played volleyball on the sand.
• The beachboys were known for their laid-back California style.
• During summer, beachboys could be seen surfing at dawn.
• The documentary featured interviews with local beachboys about their favorite breaks.