American dreamyoudaoicibaDictYouDict[American dream 词源字典]
coined 1931 by James Truslow Adams (1878-1949), U.S. writer and popular historian (unrelated to the Massachusetts Adamses), in "Epic of America."
[The American Dream is] that dream of a land in which life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement. It is a difficult dream for the European upper classes to interpret adequately, and too many of us ourselves have grown weary and mistrustful of it. It is not a dream of motor cars and high wages merely, but a dream of social order in which each man and each woman shall be able to attain to the fullest stature of which they are innately capable, and be recognized by others for what they are, regardless of the fortuitous circumstances of birth or position. [Adams]
Others have used the term as they will.[American dream etymology, American dream origin, 英语词源]
brahmin (n.)youdaoicibaDictYouDict
"member of Boston's upper class," 1823, figurative use of Brahman "member of the highest priestly Hindu caste," late 15c., from Sanskrit brahmana-s, from brahman- "prayer," also "the universal soul, the Absolute," which is of uncertain origin. Related to Brahma.
cordwainer (n.)youdaoicibaDictYouDict
"shoemaker, leatherworker," c. 1100, from Anglo-French cordewaner, from Old French cordoan "(leather) of Cordova," the town in Spain whose leather was favored by the upper class for shoes. Compare cordovan, a later borrowing directly from Spanish.
gay (adj.)youdaoicibaDictYouDict
late 14c., "full of joy, merry; light-hearted, carefree;" also "wanton, lewd, lascivious" (late 12c. as a surname, Philippus de Gay), from Old French gai "joyful, happy; pleasant, agreeably charming; forward, pert; light-colored" (12c.; compare Old Spanish gayo, Portuguese gaio, Italian gajo, probably French loan-words). Ultimate origin disputed; perhaps from Frankish *gahi (related to Old High German wahi "pretty"), though not all etymologists accept this. Meaning "stately and beautiful; splendid and showily dressed" is from early 14c. In the English of Yorkshire and Scotland formerly it could mean "moderately, rather, considerable" (1796; compare sense development in pretty (adj.)).

The word gay by the 1890s had an overall tinge of promiscuity -- a gay house was a brothel. The suggestion of immorality in the word can be traced back at least to the 1630s, if not to Chaucer:
But in oure bed he was so fressh and gay
Whan that he wolde han my bele chose.
Slang meaning "homosexual" (adj.) begins to appear in psychological writing late 1940s, evidently picked up from gay slang and not always easily distinguished from the older sense:
After discharge A.Z. lived for some time at home. He was not happy at the farm and went to a Western city where he associated with a homosexual crowd, being "gay," and wearing female clothes and makeup. He always wished others would make advances to him. ["Rorschach Research Exchange and Journal of Projective Techniques," 1947, p.240]
The association with (male) homosexuality likely got a boost from the term gay cat, used as far back as 1893 in American English for "young hobo," one who is new on the road, also one who sometimes does jobs.
"A Gay Cat," said he, "is a loafing laborer, who works maybe a week, gets his wages and vagabonds about hunting for another 'pick and shovel' job. Do you want to know where they got their monica (nickname) 'Gay Cat'? See, Kid, cats sneak about and scratch immediately after chumming with you and then get gay (fresh). That's why we call them 'Gay Cats'." [Leon Ray Livingston ("America's Most Celebrated Tramp"), "Life and Adventures of A-no. 1," 1910]
Quoting a tramp named Frenchy, who might not have known the origin. Gay cats were severely and cruelly abused by "real" tramps and bums, who considered them "an inferior order of beings who begs of and otherwise preys upon the bum -- as it were a jackal following up the king of beasts" [Prof. John J. McCook, "Tramps," in "The Public Treatment of Pauperism," 1893], but some accounts report certain older tramps would dominate a gay cat and employ him as a sort of slave. In "Sociology and Social Research" (1932-33) a paragraph on the "gay cat" phenomenon notes, "Homosexual practices are more common than rare in this group," and gey cat "homosexual boy" is attested in Noel Erskine's 1933 dictionary of "Underworld & Prison Slang" (gey is a Scottish variant of gay).

The "Dictionary of American Slang" reports that gay (adj.) was used by homosexuals, among themselves, in this sense since at least 1920. Rawson ["Wicked Words"] notes a male prostitute using gay in reference to male homosexuals (but also to female prostitutes) in London's notorious Cleveland Street Scandal of 1889. Ayto ["20th Century Words"] calls attention to the ambiguous use of the word in the 1868 song "The Gay Young Clerk in the Dry Goods Store," by U.S. female impersonator Will S. Hays, but the word evidently was not popularly felt in this sense by wider society until the 1950s at the earliest.
"Gay" (or "gai") is now widely used in French, Dutch, Danish, Japanese, Swedish, and Catalan with the same sense as the English. It is coming into use in Germany and among the English-speaking upper classes of many cosmopolitan areas in other countries. [John Boswell, "Christianity, Social Tolerance, and Homosexuality," 1980]
As a teen slang word meaning "bad, inferior, undesirable," without reference to sexuality, from 2000.
haw (v.)youdaoicibaDictYouDict
"hesitate in speech," 1580s, imitative. Related: Hawed; hawing. The noun in this sense is from c. 1600. Haw-haw in reference to a style of affected upper class British enunciation is from 1841, imitative.
sans-culotte (n.)youdaoicibaDictYouDict
also sansculotte, "lower-class republican of the French Revolution," 1790, from French, literally "without breeches;" see sans + culottes. Usually explained as referring to the class whose distinctive costume was pantalons (long trousers) as opposed to the upper classes, which wore culottes (knee-breeches), but this is not certain. Related: Sans-culottes; sans-culotterie.
toilet (n.)youdaoicibaDictYouDict
1530s, earliest in English in an obsolete sense "cover or bag for clothes," from Middle French toilette "a cloth; a bag for clothes," diminutive of toile "cloth, net" (see toil (n.2)). Toilet acquired an association with upper class dressing by 18c., through the specific sense "a fine cloth cover on the dressing table for the articles spread upon it;" thence "the articles, collectively, used in dressing" (mirror, bottles, brushes, combs, etc.). Subsequent sense evolution in English (mostly following French uses) is to "act or process of dressing," especially the dressing and powdering of the hair (1680s); then "a dressing room" (1819), especially one with a lavatory attached; then "lavatory or porcelain plumbing fixture" (1895), an American euphemistic use.

Toilet paper is attested from 1884 (the Middle English equivalent was arse-wisp). Toilet training is recorded from 1940.