Victorian London - Words and Expressions - champagne, slang for

Champagne was then The Widow - a reference to Veuve Clicquot - or The Bubbly - a nickname easily understood - or The Boy. The Boy is a title that always puzzled me until, the other day, I was informed that, in a well-known sporting club, the wine was carried about on a tray by a youth; the fact, it is declared, gave the word.

William Pett Ridge, A Story Teller : Forty Years in London, 1923