Boom! is a 1968 British drama film starring Elizabeth Taylor, Richard Burton and Noel Coward, directed by Joseph Losey, and adapted from the play The Milk Train Doesn't Stop Here Anymore by Tennessee Williams.
John Waters admires the film, and chose it as a favorite to present in the first Maryland Film Festival in 1999. The film's poster is visible in Waters' 1972 film Pink Flamingos. In an interview with Robert K. Elder for his book The Best Film You've Never Seen, Waters describes the film as "beyond bad. It's the other side of camp. It's beautiful, atrocious, and it's perfect. It's a perfect movie, really, and I never tire of it."