What is "chocolate starfish"

n. (context British vulgar slang English) The anus.

Chocolate Starfish are an Australian rock music group formed in 1992 before disbanding in 1998. By March 1993 the line-up was Zoran Romic on lead guitar, Adam Thompson on lead vocals, Darren Danielson on drums, Norman Falvo on keyboards and backing vocals and John "Stone" Nixon on bass guitar. Their self-titled debut album was issued in April 1994, which peaked at No. 2 on the ARIA Albums Chart. It was followed in October 1995 by their second album, Box, which reached No. 6. Their highest charting single, " You're So Vain", was a cover version of Carly Simon's 1972 hit. It appeared at No. 11 on the ARIA Singles Chart in September 1993. They had another hit with "Mountain" in March 1994, which reached No. 12. The group reformed in 2010, but on 31 March 2012 Romic died of non-Hodgkin lymphoma after remission from an earlier bout. The group continued and from January to March 2013 performed on the Red Hot Summer Tour alongside Jimmy Barnes, Ian Moss and Dragon.