humbug

Origin unknown; the Oxford English Dictionary (OED) states that “the facts as to its origin appear to have been lost, even before the word became common enough to excite attention”. It has been suggested that the word possibly derives from hummer (“(slang) An obvious lie”), or from hum (“(dialectal and slang) to cajole; delude; impose on”) + bug (“a goblin, a spectre”). In his Slang Dictionary (1864), English bibliophile and publisher John Camden Hotten (1832–1873) suggested a link to the name of the German city of Hamburg, “from which town so many false bulletins and reports came during the war in the last century”, or alternatively a derivation from ambage.

Hotten also said he had traced the earliest occurrence of the word to the title page of Ferdinando Killigrew’s book The Universal Jester (see quotations), which he dated to about 1735–1740. This dating has therefore been adopted by other dictionaries. However, the OED dates the word to about 1750, as the earliest edition of Killigrew’s work has been dated to 1754.