1. to fall or move heavily and suddenly with a dull sound
Usage: informal
2. to sit or lie down heavily or abruptly
Usage: informal

1. a dull, heavy sound made by something falling or landing
Usage: informal

Examples

• She flumped onto the couch after a long day at work.
• The book flumped to the floor with a heavy sound.
• He flumped down in the chair, exhausted.
• The wet dog flumped onto the kitchen tiles.
• I heard a flump as the suitcase landed on the bed.
• The child flumped backward into the pile of leaves.