Anyone of a certain age (40±) in the UK will remember, "It's Friday, It's five to five, It's Crackerjack (loud hurrah)". Crackerjack was the children's entertainment show, a fore-runner to so many of today's programmes. It had the essential ingredients, five minutes of fame for every child, slime, quizzes and if you were really lucky you could leave with a Crackerjack pencil and pen (better than a Blue Peter badge in my book). I suspect that most of us thought that the word had been created for the programme and never enquired any further.