1.the sound of a sudden heavy fall
2.euphemisms for slightly fat;
a generation ago...buxom actresses were popular- Robt.A.Hamilton
3.straight down especially heavily or abruptly;
the anchor fell plump into the sea
1.drop sharply;
The stock market plummeted
2.set (something or oneself) down with or as if with a noise;
He planked the money on the table
3.make fat or plump;
We will plump out that poor starving child
4.give support (to) or make a choice (of) one out of a group or number;
I plumped for the losing candidates