Pranksters have been playing tricks on Google's Street View cameras ever since the mapping tool was first launched in 2007, but miscreants in Victoria have delivered a low blow.

Street View images of Long Gully and Maiden Gully near Bendigo in Victoria have been defaced with a giant green penis outline after vandals climbed on top of one of Google's camera-equipped cars and drew the phallus on its camera lens.

An aerial view of Fairfield College taken two years ago.

The find was first discovered by users on BuzzFeed and has since gone viral across the web. Google Australia has yet to remove the images or make a comment on the matter - and it is not clear who is responsible.

It follows the June discovery of an array of six penises etched into the grass of a school in Waikato, New Zealand.