What is the movie with brad pitt about nazi?

You're likely thinking of Inglourious Basterds (2009), directed by Quentin Tarantino. While Brad Pitt plays a main character, "Aldo Raine," the film isn't solely about Nazis. It's an alternate history revenge fantasy where a group of Jewish-American soldiers called the "Basterds" terrorize Nazis in occupied France during World War II.