Yours, Etc.: Origins and Uses of 8 Sign-Offs
"inferior wine," 1919, colloquial, from the Italian and Spanish word for "wine," from Latin vinum (see vine).
A Latin phrase suggesting that people are more likely to say what they really feel under the influence of alcohol. It means, “There is truth in wine.”
Wine, esp red jug wine
[1919+; fr Italian, ''wine'']