Wiktionary
vb. 1 To part from a ship. 2 (context idiomatic English) To leave something, especially suddenly or rapidly.
Usage examples of "jump ship".
Bisman had gone straight to the mess hall and told everyone the Dons wanted to jump ship.
I'm very worried that she might jump ship on us, and that would ruin every step of progress we've made with her.
But before you decide to jump ship, you need to know what I know about the situation out there.
No one had yet solved the problem of getting messages through a wormhole jump except by physically transporting them on a jump ship.
If you manage to jump ship, probably the only one who gets burned is the Captain.
Pile his leige-people into the jump ship, have Thorne and Auson run him through the blockade, and thumb his nose to Tau Verde IV and all its denizens forever.