plump 2 
(plŭmp)
(plŭmp)v. plumped, plump·ing, plumps
v.intr.
1. To drop abruptly or heavily: plumped into the easy chair.
2. To give full support or praise: plumped for the candidate throughout the state.
v.tr.
To throw down or drop (something) abruptly or heavily: plumped the books onto the table.
n.
1. A heavy or abrupt fall or collision.
2. The sound of a heavy fall or collision.
adj.
Blunt; direct.
adv.
1. With a heavy or abrupt drop: The anchor fell plump into the sea.
2.
a. With a full or sudden impact: walked plump into the pole.
b. Directly: ran plump into an old friend.
3. Without qualification; bluntly: spoke out plump for the tax bill.
[Middle English plumpen, to immerse quickly, perhaps from Middle Low German, probably of imitative origin.]