pratfall

/P R AE1 T F AO0 L/
noun
  1. 1

    A fall onto the buttocks.

  2. 2

    A humiliating mistake.

  3. 3

    A staged trip or fall, often for comedic purposes.

    โ€œThe motivational speaker started with a pratfall so he could speak about the importance of getting back up.โ€

verb
  1. 1

    To fall on to the buttocks.

Source: https://en.wiktionary.org/wiki/pratfall