idea that the question of the existence of God is meaningless, because the term "god" has no unambiguous definition; requires a coherent, non-controversial definition of god before arguing on its existence

Ignosticism is the belief that people should avoid taking a position on the existence of God until the concept of God is defined.

Ignostics claims that the word "God" is meaningless until it is defined. Until one defines "God" they might as well be saying "Fob".

This also means that until you are debating a definition of God that is able to be proven false, you might as well be debating about the word "Fob".

It is sometimes considered synonymous with theological noncognitivism.