Shitkansen (n)

A slow or low-quality train. Portmanteau of ‘shit’ or ‘shitcan’ + ‘shinkansen’, Japanese high-speed train.

Earliest Googleable usage: December 2008.

Dennis Vranic Japan has Shinkansen, we have SHITkansen

Often used in reference to the Sydney-to-Newcastle train journey (eg, Aaron Hewett and Marcus Westbury).