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Piccadilly butcher
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
In reference to their savage onslaught upon the crowd on the occasion of the arrest of Sir Francis Burdett at his house in Piccadilly.
Noun
en obsolete UK slang derogatory A member of the regiment of Horse Guards, or "Royal Blues".
en 1875 The Law Magazine and Review 554 The mob in the meantime holloaed out, "No Corn Bill!" While they were proceeding in this manner, a cry was raised that "the Piccadilly butchers were coming."
en 1913 Ash's Monthly 532 "In 1810, my father very nearly had his head cloven by a Piccadilly butcher when merely looking on to see Sir Francis Burdett taken to the tower."
References
en 1873 John Camden Hotten The Slang Dictionary