An acronym for "graphic novel". A sort of expanded comic book but one that tells a complete story rather than a classic comic book in which the story does not have a traditional ending and may be told for years.
Watchmen, The Dark Knight Returns and V for Vendetta are all considered milestone GNs.
Someone who believes it's their duty to attempt to correct any grammar and/or spelling mistakes they observe. Usually found hanging around Irc chatrooms hounding "n00bs".
Well at least you can spell dyslexic correctly.