BTS(redirected from Bt)
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An initialism of "behind the scenes," used as a modifier to describe something that occurs during the making of something, especially a film. We've hired a separate film crew to document the entire BTS production process. Shocking new BTS footage shows the actor exploding at the crew with a torrent of profanities.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.