0 to sit down suddenly and heavily, or to put an object or child down suddenly and without taking care:
She plumped down next to me on the sofa.
He rushed in and plumped himself down in a chair.
Joan sat down at the front of the bus, and plumped her bags down beside her.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
plump (sb/sth) down