Posh is a famous Bin Weevil. She is Dosh's twin sister. She loves shopping so much and according to the Binweevils Top Trumps, she was "born to shop". In Mission 1 of SWS, Weevil X stole her Bin Pet. At the end of the mission, you rescue her Bin Pet and give it back to her. As of May 2012, she had a makeover and got a new appearance
Here is her biography:
As rich as her brother, Dosh, Posh was born to go shopping. And party. But mostly to go shopping.