plonk: excl.,vt. [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*") is now (1994) widespread on Usenet as a form of
public ridicule.