Pratfall (noun)

A fall on one's buttocks; a comic or embarrassing fall.

Origin:

Early 20th century: prat "buttocks" + fall.

Examples:

1. He took a pratfall on the stage.
2. The comedian's pratfall got a big laugh from the audience.
3. The pratfall was caused by the banana peel on the floor.
4. The pratfall was part of the slapstick routine.
5. The pratfall was embarrassing but he laughed it off.