Definition of: plunk

(plungk) Colloq. v.t.
1. To pluck, as a banjo or its strings; strum.
2. To place or throw heavily and suddenly: with down.
—v.i.
3. To emit a twanging sound.
4. To fall heavily or suddenly; plump.
—noun
1. A heavy blow, or its sound.
2. Slang A dollar. [Imit.]