1. People who listen to and enjoy heavy metal or hard rock music, often characterized by vigorous head movements while dancing or at concerts.
Usage: informal; plural form of headbanger
2. People who engage in the practice of repeatedly striking their head against something, sometimes as a form of self-injury or behavioral issue.
Usage: medical/behavioral context

Examples

• The concert was packed with headbangers enjoying the heavy metal performance.
• Headbangers at the festival wore band t-shirts and leather jackets.
• The music video featured energetic headbangers moving to the beat.
• Some headbangers have been fans of the band for over twenty years.
• The mosh pit was filled with enthusiastic headbangers.
• Headbangers often form tight-knit communities around their favorite bands.