fandamentalist
n.— «Fandamentalists. (noun, pl.); fans who violently believe the only valid interpretation of any entertainment source is a dogmatic adherence to their favorite version of that source. Any change to the smallest detail is inherently unacceptable (see also “heresy”) and met with frantic scorn.» —“Fandamentalism” by John Rogers Kung Fu Monkey Dec. 8, 2004. (source: Double-Tongued Dictionary)
Further reading
Old. Elderly. Senior. Why are we so uncomfortable when we talk about reaching a certain point in life? An 82-year-old seeks a more positive term to describe how she feels about her age. And: a linguist helps solve a famous kidnapping case, using the...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...