Barman Liam Lloyd Warriner, from Sydney, was fined AU$750 or US$800 for mooning Queen Elizabeth II and her husband, Prince Philip, during a royal visit to Australia last year. Prosecutors had asked for a AU$1,000 fine.
Warriner, 22, has pleaded guilty to one count of public nuisance during the Brisbane tour in October and was sentenced on Tuesday, for flashing his buttocks to the 85-year-old monarch and her 90-year-old husband. Warriner has said he would do it again, according to reports.
Prior to his sentencing police formally dropped a second charge of willful exposure. The Brisbane Magistrates Court was told that Warriner dropped his trousers and ran alongside the queen's motorcade for 50 metres (165 feet). He did so with an Australian flag clasped between his buttock cheeks, Australian Associated Press reported.
It is unknown if the queen and her husband saw him.
Warriner told police it was a political protest, showing his contempt for the monarch and elitist groups, the court heard.
Outside of court Warriner said he would do the same if other dignitaries should visit.
Any self-important, self-propagating elitist, I will happily bare my buttocks to, he said.