with or as if with a sudden muffled thud: The huge stone hit the water kerplunk.

Origin of kerplunk

First recorded in 1885–90; see origin at ker-, plunk Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for kerplunk

Historical Examples of kerplunk

  • Then I began to fly—drift down, and all of a sudden, kerplunk, I fell out of bed.

    Mitch Miller

    Edgar Lee Masters

  • "That colour of hair and eyes always knocks me kerplunk," observed Hollanden softly.

    The Third Violet

    Stephen Crane