Wibbler

Wibbler: Noun; someone who doesn't believe in misinformation myths without question and/or proof. Recognises such nonsense and responds to it with more satirical nonsense in the form of replying "Wibble". Overall more rational, more logical and basically not a conspiratorial backwards thinking delusionary.

To wibble someone: verb; to mock someone's lunacy with a statement of "wibble" to imply they're talking utter nonsense and it's being responded to as such, with the disregard it deserves.

John went on to explain he was amendment the pigeons were secretly 5G Government robots sent to spy on us, being a Wibbler and used to hearing this kind of thing Frank stared at him in disbelief and calmly said "wibble".