Jump ship

As soon as the battleship docked in Singapore, Roger jumped ship, never to return.

I couldn't hack it as a teacher, so I jumped ship and flew back to Australia.

The few stalwarts praising the prime minister’s non-remorse today will be of small comfort to him, given their ranks include Ann Widdecombe and Patrick O’Flynn of the Express, while another of their ilk, the Telegraph’s Allison Pearson, has jumped ship altogether.