Abracadabra isn't just a magician's wind-up to a trick; it's also a word for a load of gibberish or nonsense.
You probably know abracadabra as a word a magician might use before sawing a woman in half or making something disappear. However, it has another meaning similar to other reduplicative such as jibber-jabber and mumbo-jumbo: nonsense. Someone spouting a bunch of weird talk that doesn't make any sense is speaking abracadabra. If you want to dismiss something written or spoken, you could say, "That's a bunch of abracadabra!" Like a baby's babbling, abracadabra is meaningless.