mosh

1. (intransitive) To dance by intentionally jumping into and colliding with other, similarly behaving dancers, and performing other wild, aggressive, or spastic movements.Examples: "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."intransitive

2. (transitive, rare) To intentionally jump into and collide with (another dancer) at a concert.raretransitive