Verb
1. make or move along with a sound as of a horse's hooves striking the ground
2. set (something or oneself) down with or as if with a noise;
"He planked the money on the table""He planked himself into the sofa"3. drop steeply;
"the stock market plunged"4. pull lightly but sharply with a plucking motion;
"he plucked the strings of his mandolin"