A humbug is a person or object that behaves in a deceptive or dishonest way, often as a hoax or in jest. The term was first described in 1751 as student slang, and recorded in 1840 as a "nautical phrase". It is now also often used as an exclamation to describe something as hypocritical nonsense or gibberish.

When referring to a person, a humbug means a fraud or impostor,