Nonsense or meaningless speech.
Senseless language designed to obscure an issue or confuse a listener.
A complicated or obscure ritual.
An object believed to have supernatural powers.
Unintelligible or incomprehensible language.
It is a meaningless speech and often associated with spurious religious ritual.
There's so much mumbo jumbo in his answer that it's hard to make sense of them.
His speech confuse the audience as it was much mumbo jumbo.
The old Mumbo Jumbo concept of religion has no proof.