Verb

1. To dance by intentionally jumping into and colliding with other, similarly behaving dancers, and performing other wild, aggressive, or spastic movements.
   • 2005 July 28, Kelefa Sanneh, “Heat, Good Cheer, Jagged Music and Even Some Melody”, New York Times

     From 9 in the morning (when It Dies Today played the lot) until 9 at night (when Ozzy Osbourne led Black Sabbath on the main stage), hardy fans cheered and moshed and staggered through a stifling but often exciting day.

2. To intentionally jump into and collide with another, similarly behaving dancer at a concert.