Translates to "bunch", bonche is when a group of friends go out to an event, or party.
Vamos al bonche
1. Wild partying. 2. Wild party. 3. Underground party, concert or event where a DJ is usually present.
Person 1: Did you go to the party last night?
Person 2: Man! that was bonche, people all over got drunk, naked and jumped in the pool.