dandy: [18] The first record of the word dandy comes in Scottish border ballads of the late 18th century, but by the early 19th century it had become a buzz term in fashionable London society. It is generally explained as being an abbreviation of jack-a-dandy ‘affected man’, a word first recorded in the 17th century which apparently incorporates Dandy, a colloquial Scottish abbreviation of the name Andrew. The word’s adjectival use started in the 19th century in close semantic relationship to the noun – ‘affectedly trim or neat’ – but American English has rehabilitated it to ‘excellent’ in the 20th century. => andrew[dandy etymology, dandy origin, 英语词源]