So what's the musical connection? This is not known among the general public, but famous classical guitarists are also a sub-culture and also have nicknames. I learned this when I was in the master class of Oscar Ghiglia, one of Segovia's outstanding students. The well-known Spanish guitarist Narciso Yepes (1927 - 1997) shown below:
Has been given the unedifying nickname "Nabisco Herpes". While the handsome American guitarist Christopher Parkening (b. 1947):
sports the nickname "Customer Parking". Oscar Ghiglia himself (b. 1938), a large man, fond of eating, also has a nickname:
His is "Boxcar Piglia". Continuing on in that tradition, Oscar gave me an official guitar sub-culture nickname. Mine is "Brainless Tonsil".
It's a compliment?