a person or thing that plunks.
Angling. a casting lure that makes a plunking sound upon hitting the surface of the water.

Origin of plunker Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for plunker

Historical Examples of plunker

  • Plunker was very grateful to these fine fellows for the valuable service they had rendered.