To walk the plank Meaning, Definition & Usage

Definitions
  1. to walk off the plank into the water and be drowned; an expression derived from the practice of pirates who extended a plank from the side of a ship, and compelled those whom they would drown to walk off into the water; figuratively, to vacate an office by compulsion. Bartlett.
Definitions
  1. to walk along a plank laid across the bulwark of a ship, until one overbalances it and falls into the sea; a method of disposing of captives practiced by pirates.
  2. to walk off the plank into the water and be drowned; an expression derived from the practice of pirates who extended a plank from the side of a ship, and compelled those whom they would drown to walk off into the water; figuratively, to vacate an office by compulsion. Bartlett.

Webster 1913