[ARCADIA]

What's a "mosh"? (feeling very old as I type this)

[Millee]

Here's Websters definition: to engage in uninhibited often frenzied activities (as intentional collision) with others near the stage at a rock concert.

It's just a bunch of people pushing each other in a large group setting. You're being pushed from behind into someone else..etc..etc... I'm sorry I'm not articulating it well, but it's scary.