Elle, has your 13th edition got a middle section like my 12th? It is called "The Word Lover's Miscellany" and is a wonderful collection of slang, obscure words, insults etc. Among the 38 insults is "mutton-thumper". Taghairm is shown under "25 words for intriguing things" which also includes the lovely "Tom Tiddler's ground"
@ Chris, I am now laughing so much......