planking

/P L AE1 NG K IH0 NG/
verb
  1. 1

    To cover something with planking.

    โ€œto plank a floor or a shipโ€

  2. 2

    To bake (fish, etc.) on a piece of cedar lumber.

  3. 3

    To lay down, as on a plank or table; to stake or pay cash.

    โ€œto plank money in a wagerโ€

  4. 4

    To harden, as hat bodies, by felting.

  5. 5

    To splice together the ends of slivers of wool, for subsequent drawing.

  6. 6

    To pose for a photograph while lying rigid, face down, arms at side, in an unusual place.

noun
  1. 1

    A series of planks; a group of planks.

  2. 2

    The practice of lying face down with arms to the sides, in unusual public spaces, and taking photographs to record the act.

Source: https://en.wiktionary.org/wiki/plank, https://en.wiktionary.org/wiki/planking