Wiktionary
dwile flonking
n. (context British English) An obscure and intentionally preposterous sport in which teams take turns to dance while avoiding a "dwile" (beer-soaked cloth) thrown by their opponents.
Wikipedia
Dwile flonking
The English game of dwile flonking (also dwyle flunking) involves two teams, each taking a turn to dance around the other while attempting to avoid a beer-soaked dwile (cloth) thrown by the non-dancing team.
"Dwile" is a knitted floor cloth, from the Dutch dweil, meaning "mop", and "flonk" is probably a corruption of flong, an old past tense of fling.