What was The first movie ever given the title Blockbuster was which movie?

The first movie ever given the title "Blockbuster" is generally considered to be "Jaws," directed by Steven Spielberg and released in 1975. The film's massive box office success and cultural impact helped define the concept of the summer blockbuster, paving the way for future high-grossing films. Its innovative marketing strategies and wide release also contributed to its status as a pivotal moment in cinematic history.