when at a party/school disco, two male teenage(often univited friends (best mates and loners) who arent getting into the party and generally have distain for the music played or hosts of the party, often by shouting "two man mosh pit!", start moshing and jumping into eachother violently for a brief period startling the people sitting on sofas singing to girls aloud.
"Hey Ed, why did we go to this girls party. The music sucks"
"You know what I'm thinking?"
"TWO MAN MOSH PIT!"