ETYMOLOGY
– from jingle + brains
EXAMPLE
“…We left these Jingle Brains to their Crotchets , and proceeded to the West end of the Cathedral , where we past by abundance of Apples, Nuts, and GingerBread, till we came to a melancholly Multitude , drawn into a Circle , giving very serious Attention to a blind Ballad-singer who was mournfully setting forth the wonderful Usefulness…”
From: The London-spy Compleat, in Eighteen Parts,
Edward Ward, 1718
Lexicophilia 