Wikipedia
Moomba (also known as the Moomba Festival), held annually in Melbourne, is Australia's largest free community festival and one of Australia's longest running community festivals. It is celebrated during the Labour Day long weekend (over four days, from Friday to the second Monday in March). Moomba is culturally important to Melbourne, having been celebrated since 1955 and regularly attracts up to a million people with a record attendance of 1.7 million set in 1996.
In 2003, the event was renamed Melbourne Moomba Waterfest and is centred on the Yarra River. It is run by the City of Melbourne.
Traditional events include the Moomba parade, crowning of Moomba monarchs, fireworks displays, carnivals in the gardens along the river, river activities including watersports, water floats, the birdman rally, as well as live music and bands.
Usage examples of "moomba".
She was even elected Moomba Monarch, and tried on the royal robes over her track shoes and tracksuit pants.
It started in the Gidgealpa and Moomba oil and gas fields, but how or why it started, no one knows.