E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Unmentionables.
Breeches.
1
“Corinthians and exquisites from Bond Street, sporting an eye-glass, … waiting-men in laced coats and plush unmentionables of yellow, green, blue, red, and all the primary colours.”—Rev. N. S. Wheaton: Journal (1830).
