PLUMPING

To grow plump; to swell out.

"Her cheeks have plumped."

To make plump; to fill (out) or support; often with up.

"to plump oysters or scallops by placing them in fresh or brackish water"

To cast or let drop all at once, suddenly and heavily.

"to plump a stone into water"

To drop or fall suddenly or heavily, all at once.

The act by which something is plumped.