"Hava Nagila" (הבה נגילה in Hebrew) is a Hebrew folk song, the title meaning "Let us rejoice". It is a song of celebration, especially popular amongst irreligious Jewish and Roma communities. In popular culture, it is used as a metonym for Judaism, and is a staple of band performers at Jewish festivals.
When I was growing up in southern California in the early 1960s we were taught this song in public school physical education class along with a dance. The dance and the song together were called "The Hava Nagila" but the dance was actually the Horah.