Derived from force majeure. The irresistible compulsion (exclusive to otaku and other nerds) to correct, or at least point out, inconsequential petty mistakes or inconsistencies in language, reproduction or representation.
My overwhelming desire to be pedantic with this Urban Dictionary entry is a result of nerd majeure.

or

I am compelled by nerd majeure to point out that in frame 3754 of (random anime movie), the alien's third tentacle has no shadow.
by ithcy February 17, 2006
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