Rat de bibliothèque. Green's Dictionary of Slang https://t.co/iwjbky34UD Timelines of Slang: https://t.co/Yt0StP7m9R
@Susanna_Forrest Might this have any specific meaning? ‘The gray-haired colonel sitting farmer fashion astride an easy-going old horse.’ Capt. Charles King, Between the Lines (1889). Or just a sense of comfortable casualness?