It is one of the great strengths of the Shorter that it is large enough to account for cultural allusions, and to keep its coverage of them up to date. An example is the new phrase
go up to eleven. This comes from a scene in the comedy film This is Spinal Tap (1984), in which a guitar player shows off a supposedly louder amplifier with control knobs having 11 rather than 10 as the top setting. Most of the citations on our database refer to musicians 'turning their guitars up to 11', but we noticed that recently people have started to use the phrase in other contexts. Take this 2001 example, from Heat magazine: 'Julia has set her feistiness setting to 11 in her role of tough Samantha'. In a few years' time, the link with music could have been obscured or even lost entirely; alternatively, the phrase could have fallen from use, remaining as a historical curiosity that the Shorter explains to students of this period!
http://www.askoxford.com/worldofwords/wordfrom/shorter/