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sandwich [sandwich 词源字典]: sandwich: [18] John Montagu, the fourth Earl of Sandwich (1718–92), is said to have been so addicted to the gambling table that in order to sustain him through an entire 24-hour session uninterrupted, he had a portable meal of cold beef between slices of toast brought to him. The basic idea was nothing new, of course, but the Earl’s patronage ensured it a vogue, and by the early 1760s we have the first evidence of his name being attached to it: the historian Edward Gibbon in 1762 recorded in his diary how he dined at the Cocoa Tree and saw ‘twenty or thirty of the best men in the kingdom … supping at little tables … upon a bit of cold meat, or a Sandwich’.
[sandwich etymology, sandwich origin, 英语词源]
chip (n.1): Old English cipp "piece of wood," perhaps from PIE root *keipo- "sharp post" (cognates: Dutch kip "small strip of wood," Old High German kipfa "wagon pole," Old Norse keppr "stick," Latin cippus "post, stake, beam;" the Germanic words perhaps borrowed from Latin).

Meaning "counter used in a game of chance" is first recorded 1840; electronics sense is from 1962. Used for thin slices of foodstuffs (originally fruit) since 1769; specific reference to potatoes is found by 1859 (in "A Tale of Two Cities"); potato chip is attested by 1879. Meaning "piece of dried dung" first attested 1846, American English.

Chip of the old block is used by Milton (1642); earlier form was chip of the same block (1620s); more common modern phrase with off in place of of is early 20c. To have a chip on one's shoulder is 1830, American English, from the custom of a boy determined to fight putting a wood chip on his shoulder and defying another to knock it off. When the chips are down (1940s) is from the chips being down on the table after the final bets are made in a poker match.
London: chief city and capital of England, Latin Londinium (c.115), often explained as "place belonging to a man named Londinos," a supposed Celtic personal name meaning "the wild one," "but this etymology is rejected in an emphatic footnote in Jackson 1953 (p.308), and we have as yet nothing to put in its place" [Margaret Gelling, "Signposts to the Past: Place-Names and the History of England," Chichester, 1978]. London Bridge the children's singing game is attested from 1827. London broil "large flank steak broiled then cut in thin slices" attested by 1939, American English; London fog first attested 1830.
pork (n.): c. 1300 (early 13c. in surname Porkuiller), "flesh of a pig as food," from Old French porc "pig, swine, boar," and directly from Latin porcus "pig, tame swine," from PIE *porko- "young swine" (cognates: Umbrian purka; Old Church Slavonic prase "young pig;" Lithuanian parsas "pig;" and Old English fearh, Middle Dutch varken, both from Proto-Germanic *farhaz).

Pork barrel in the literal sense is from 1801, American English; meaning "state's financial resources (available for distribution)" is attested from 1907 (in full, national pork barrel); it was noted as an expression of U.S. President President William Howard Taft:
"Now there is a proposition that we issue $500,000,000 or $1,000,000,000 of bonds for a waterway, and then that we just apportion part to the Mississippi and part to the Atlantic, a part to the Missouri and a part to the Ohio. I am opposed to it. I am opposed to it because it not only smells of the pork barrel, but it will be the pork barrel itself. Let every project stand on its bottom." ["The Outlook," Nov. 6, 1909, quoting Taft]
The magazine article that includes the quote opens with:
We doubt whether any one knows how or when, or from what application of what story, the phrase "the National pork barrel" has come into use. If not a very elegant simile, it is at least an expressive one, and suggests a graphic picture of Congressmen eager for local advantage going, one after another, to the National pork barrel to take away their slices for home consumption.
Pork in this sense is attested from 1862 (compare figurative use of bacon). Pork chop is attested from 1858. Pork pie is from 1732; pork-pie hat (1855) originally described a woman's style popular c. 1855-65, so called for its shape.
sandwich (n.): 1762, said to be a reference to John Montagu (1718-1792), Fourth Earl Sandwich, who was said to be an inveterate gambler who ate slices of cold meat between bread at the gaming table during marathon sessions rather than get up for a proper meal (this account dates to 1770). It was in his honor that Cook named the Hawaiian islands (1778) when Montagu was first lord of the Admiralty. The family name is from the place in Kent, Old English Sandwicæ, literally "sandy harbor (or trading center)." For pronunciation, see cabbage. Sandwich board, one carried before and one behind, is from 1864.
sashimi (n.): "thin slices of raw fish," 1880, from Japanese, from sashi "pierce" + mi "flesh."
doner kebab: "A Turkish dish consisting of spiced lamb cooked on a spit and served in slices, typically with pitta bread", From Turkish döner kebap, from döner 'rotating' and kebap 'roast meat'.