A phrase used (by a stage magician, etc.) as a magical incantation to bring about some change: abracadabra, hey presto.
Religious or supernatural phenomena one holds to be nonsense or mere trickery; superstitious mumbo-jumbo.
Some action carried out to bring about change as if by magic; a trick; sleight of hand, trickery.
Some ineffectual action or speech, especially if intended to divert attention; nonsense.