plonk: excl. [Usenet possibly influenced by British slang
`plonk' for cheap booze, or `plonker' for someone behaving
stupidly (latter is lit. equivalent to Yiddish `schmuck')] The
sound a {newbie} makes as he falls to the bottom of a {kill
file}. While it originated in the {newsgroup}
talk.bizarre, this term (usually written "*plonk*") now
(1994) widespread on Usenet as a term of public ridicule.