To jump ship literally means to suddenly abandon one’s post on a ship, as a sailor. Also, to leave a place, situation, or person, usually forever. 

For example:

None of the editors liked the new policies, so they all jumped ship as soon as other jobs opened up.

I can’t believe he resigned and jumped ship before bringing about the big changes he promised.

Landau had jumped ship by the time the company collapsed. 

For weeks, he worked eighteen-hour days, pleading with his staff not to jump ship. He wanted to save his company at all costs.

The original star of the TV series jumped ship after the first season.

After the founder left, a lot of the employees jumped ship.

Tradução: abandonar o barco.