inexpressibles en · NOUN
Etymology
From inexpressible + -s. Compare unmentionables (“underwear”).
Meanings
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(colloquial, dated, plural, plural-only) Breeches, trousers.
For some years past the favorite costume of the out-and-out young gentleman has been a rough pilot coat, with two gilt hooks and eyes to the velvet collar; buttons somewhat larger than crown-pieces; a black or fancy neckerchief, loosely tied; a wide-brimmed hat, with a low crown; tightish inexpressibles, and iron-shod boots.
1833-36, Charles Dickens, Sketches by Boz, "The Out and Out Young Gentleman", in The Oxford Illustrated Dickens, p. 596"Well , my good man ," said he , brushing off , with the arm of his coat , some dust that had settled on his inexpressibles
1832, Edward Bulwer-Lytton, Eugene Aram:"I had barely the time, as he made for the cabin door, to grab him by the seat of his inexpressibles.
1903, Joseph Conrad, Falk:Have you never observed, through my inexpressibles, a large prominency, circa genitalia? It was a swelled testicle […] .
1796, Edward Gibbon, letter, in Memoirs of My Life, Penguin 1990, p. 196