Why is the ninth month called September?
1590s, of unknown origin; originally a jumbled mix of liquors (milk and beer, beer and wine, etc.), transferred 1670s to "senseless jumble of words." From dash; first element perhaps cognate with Danish balder "noise, clatter" (cf. boulder).
Nonsense!: pure balderdash
[1674+; originally denoted a frothy liquid or an unappetizing mixture of drinks]