Humbug/ˈhʌmbʌɡ/ Definition 1 of 5Pro Tip 1/3Skepticism Required Use 'humbug' to express doubt about someone's honesty or the truth of a situation. His charity work seems like humbug to me. Pro Tip 2/3Implies Dishonesty 'Humbug' suggests that someone is being intentionally dishonest, not just mistaken. His explanation was utter humbug; he knew it wasn't true. Pro Tip 3/3Cultural Association Often associated with themes of fakery or charlatanism in cultural works, such as in literature. The character was a humbug, fooling the whole town.