noun

1. The sound of something solid landing.

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

verb

1. To set or toss (something) down carelessly.

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

2. To automatically ignore a particular poster.

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

Synonyms: killfile

adverb

1. (followed by a location) Precisely and forcefully.

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

Synonyms: bang, slap bang

interjection

1. The sound made by something solid landing.

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