Australia, 1972—a person, usually a man, who, in spite of a superficial smartness, is untrustworthy—‘rat’ refers to a deceitful or disloyal man—the image is that, despite the gold tooth, a rat’s basic nature cannot change
informal and often humorous: denotes the explicit or most intimate details of something—originally (USA, 1859) referred to accounts or representations of acts of violence and bloodshed
USA, 1856—to ask someone young, ill-equipped or inexperienced to do difficult or complicated work—this phrase usually occurs in negative contexts, especially as ‘never send a boy to do a man’s work’
USA, 1901—wonderfully stylish, elegant or fashionable—a blend of ‘swell’ and ‘elegant’—popularised by its use in the song Well, Did You Evah!, interpreted by Bing Crosby and Frank Sinatra in the 1956 film High Society
UK, 1983—‘Ruby Murray’, the name of a Northern-Irish singer (1935-1996), is rhyming slang for the noun ‘curry’, denoting a dish of meat, vegetables, etc., cooked in an Indian-style sauce of hot-tasting spices and typically served with rice.
1945—a woman from Liverpool, a city and seaport in north-western England—from the noun ‘Scouser’, denoting a person from Liverpool, and the suffix ‘-ette’, used to form nouns denoting female gender
Lancashire, England, 1973—a wasted journey; a weird way of behaving; a fit of ill temper—origin unknown—one hypothesis is that when wine boats from the Mediterranean arrived in Liverpool, the wine was occasionally sour and therefore useless
UK, 2005—used rhetorically to express indifference to, or a lack of concern about, something—originally (2004) a catchline used by Lauren, a teenage girl interpreted by the British comedian Catherine Tate in the British television comedy series The Catherine Tate Show
UK, 1980—denotes someone or something that is unwelcome, unpopular, etc.—first recorded in a remark by the Scottish comedian Billy Connolly, but perhaps originated in Royal-Navy slang
USA, 1999—unfashionable or socially awkward in a way regarded as appealing or endearing—blend of ‘adorable’ and ‘dork’—the noun ‘dork’ denotes an odd, socially awkward, unstylish person