coach (v.)youdaoicibaDictYouDict[coach 词源字典]
1610s, "to convey in a coach," from coach (n.). Meaning "to prepare (someone) for an exam" is from 1849. Related: Coached; coaching.[coach etymology, coach origin, 英语词源]
PhiladelphiayoudaoicibaDictYouDict
city in Pennsylvania, U.S., from Greek, taken by William Penn to mean "brotherly love," from philos "loving" (see -phile) + adelphos "brother" (see Adelphia). Also the name recalls that of the ancient city in Lydia, mentioned in the New Testament, which was so called in honor of Attalos II Philadelphos, 2c B.C.E. king of Pergamon, who founded it. His title is said to have meant "loving the brethren." Philadelphia lawyer "clever, shrewd attorney" attested from 1788 in London, said originally to have been applied to Andrew Hamilton, who obtained the famous acquittal of J.P. Zenger on libel charges in 1735.
[C]ricket and coaching were after all popular in their day in places besides Philadelphia. It was merely that Philadelphia kept on with them longer than most places. This is a perennial Philadelphia trick, and gives to Philadelphia a sort of perpetual feeling of loss. Philadelphians are always just now getting rid of things that are picturesque, like those gas lamps on the streets, only because everybody else got rid of them long ago. [Nathaniel Burt, "The Perennial Philadelphians," 1963]
Stilton (n.)youdaoicibaDictYouDict
1736, cheese made famous by a coaching inn at Stilton on the Great North Road from London, the owner being from Leicestershire, where the cheese was made. Since 1969 restricted to cheese made in Leicester, Derby, and Nottingham counties by members of the Stilton Cheese Makers Association. The place name is in Domesday Book as Stichiltone and probably means literally farmstead or village at a stile or steep ascent.
tip (v.2)youdaoicibaDictYouDict
"give a small present of money to," c. 1600, originally "to give, hand, pass," thieves' cant, perhaps from tip (v.3) "to tap." The meaning "give a gratuity to" is first attested 1706. The noun in this sense is from 1755; the noun meaning "piece of confidential information" is from 1845; and the verb in the sense "give private information to" is from 1883.

The popularity of the tale of the word's supposed origin as an acronym in mid-18th century English taverns seems to be no older than Frederick W. Hackwood's 1909 book "Inns, Ales and Drinking Customs of Old England," where it was said to stand for To insure promptitude (in the form to insure promptness the anecdote is told from 1946). A reviewer of the book in the "Athenaeum" of Oct. 2, 1909, wrote, "We deprecate the careless repetition of popular etymologies such as the notion that "tip" originated from an abbreviated inscription on a box placed on the sideboard in old coaching-inns, the full meaning of which was "To Insure Promptitude." Also see here.