Meaning

• The sound of something solid landing.

  "I just heard a plonk – did something fall down in the kitchen?"

Meaning

• To set or toss (something) down carelessly.

  "When you’ve finished with the sponge, just plonk it back in the sink."

• To automatically ignore a particular poster.

  "I got tired of his trolling and ad hominem attacks, so I plonked him."

Meaning

• (followed by a location) Precisely and forcefully.

  "He dropped his bag of tools plonk in the middle of the table."

Meaning

• The sound made by something solid landing.

• The supposed sound of adding a user to one's killfile.