Its name is a reference to walking the plank, a method of execution practiced on special occasion by pirates, mutineers, and other rogue seafarers.
Description
What's harder than getting a zombie out of your backyard? Getting a wet zombie out of your pool!
Remember folks: "Save your brain, give your pool a drain."
Strategy
One of the pools usable to unlock this medal, near the Out of Shape Human
While the hint to unlock this medal might not be very obvious, the requirements are almost the same as Pea in the Pool: you need to have a Captain Deadbeard stand on a pool. After doing that, the medal should unlock immediately.
A pool near the Out of Shape Human can be used to unlock this medal.
Trivia
Pea in the Pool is the plant counterpart of this medal, which requires having Peashooter stand on a pool.