Humbug is an archaic term meaning "hoax", or "jest". While the term was first attested in 1751 in student slang, its etymology is unknown. It is known, however, that it was used as profanity centuries ago, in places such as Great Britain. Its present meaning as an exclamation is closer to "nonsense", or "gibberish", while as a noun, a humbug refers to a fraud or impostor, implying an element of unjustified publicity and spectacle. The term was also used for certain types of candy.
In modern usage, the word is probably most associated with Ebenezer Scrooge, a character created by Charles Dickens. His famous reference to Christmas, "Bah! Humbug!", declaring Christmas to be a fraud, is heard afresh every year around Christmas time when the perennial favorite, A Christmas Carol, is played on stage or TV.
P. T. Barnum was a master of humbug, creating public sensations and fascination with his masterful sense of publicity. Many of his promoted exhibitions were obvious fakes, but the paying public enjoyed viewing them, either to scoff or for the wonder of them. If the word humbug enjoyed contemporary usage, it would likely be applied to supermarket tabloids and the publicity industry. A famous humbug took place on the arrival of the actress/theatre manager Jenny Lind to America, just outside the showplace of P. T. Barnum, the New American Museum, in 1850 (etching, right).
In several East-Indian dialects, the word is borrowed from English, and used to mean "to deceive" or "to cheat". In Australian Aboriginal English, humbug means "to pester or annoy."
"The witch, in gypsy as in other lore, is a haunting terror of the night. It has not, that I am aware, ever been conjectured that the word Humbug is derived from the Norse hum, meaning night, or shadows (tenebræ) (JONÆO, "Icelandic Latin glossary in Niall's Saga"), and bog, or bogey, termed in several old editions of the Bible a bug, or "bugges." And as bogey came to mean a mere scarecrow, so the hum-bugges or nightly terrors became synonymes for feigned frights. "A humbug, a false alarm, a bug-bear" ("Dean Milles MS." HALLIWELL). The fact that bug is specialty applied to a nocturnal apparition, renders the reason for the addition of hum very evident.