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(B)ack (C)rowd (G)ack. To B.C.G one or more people are to move or suggest moving to the back of the mosh/rave while on ecstasy. although this term stands for being on ecstasy it doesn’t mean you actually have to, it is the meaning of moving to the back of the crowd to be able to have more space for a dance. This allows for one or more to have more room boogie on the dance floor. It usually means being less cramped and the better way to enjoy the music/set by not being so push and shove at the front of a mosh.
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