humbug

Concise Oxford English Dictionary © 2008 Oxford University Press:
humbug/ˈhʌmbʌɡ/

▶noun

• 1 deceptive or false talk or behaviour.

  ■ a hypocrite.

• 2 Brit. a boiled peppermint sweet.

▶verb (humbugs, humbugging, humbugged) deceive; trick.

– derivatives
humbuggery noun.

– origin C18: of unknown origin.