A box office bomb is a movie that loses money compared to its budget. box office bombs can occur for a number of reasons, including poor marketing, bad reviews, or simply because the movie is not popular with audiences (e.g the movie totally sucks!). Whatever the reason, box office bombs are major financial losses for studios and can often lead to the cancellation of sequels or even entire franchises. In some cases, this has led to the demise of the studio... not often, but it happens!