Verb
(historical, also figuratively) On an early naval vessel or pirate ship: to be forced to walk off the end of a gangplank (a plank of wood extending outwards from the side of the vessel) and plunge into the ocean and drown, used as a method of killing.
Synonym: walk the gangplank
(idiomatic) To be forced to resign from a position in an organization.
Synonym: walk the gangplank
After he was caught selling company secrets, it’s not surprising they made him walk the plank.