Definitions

1. verb

to fall or drop with a dull thud; to collapse or fall heavily

“The ball flumped to the ground after being dropped.”

2. noun

a dull thud or a heavy fall, especially of something falling to the ground

“The flump of the book hitting the floor startled me.”

3. interjection

expressing a dull thud or a heavy fall

“Flump! The book hit the floor.”