Nintendo Uncle Syndrome is another version of a know-it-all. In this case, generally regarding Nintendo news and otherwise and the attempt at seeming legit by using an 'uncle' to stand in as proof. The uncle who 'works at Nintendo.'

Oftentimes it is just someone who always wants to be right, needs you to 'just trust them man' or otherwise just enjoys lies for the sake of it.
"Ralph always seems to think we believe him when he tells us what Nintendo will do next but he just suffers from Nintendo Uncle Syndrome."
by Mulina April 6, 2023
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