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1.
FIDs

Generally, it's someone who writes/draws/roleplays as a furry or anthropomorph, but is dead set against anyone consitering them part of the "fandom" or calling them or their work "furry"

Do note that this term only applies to someone who mainly draws/writes anthropomorphs, and RPs them with other anthropomorphic characters. Someone who just draws the occasional bipedial wombat probably isn't a FID.
"Erikcat, we understand that you don't do the creepy shit, but face it, man, we first met on FurryMUCK; your an FID"
by Jester October 08, 2004
 
2.
Everyone who goes to furry or otherkin websites and denies that they go there or are a furry. They should just go kill themselves and make the our mundane world a better place that is furry free.
Furries in denial are everywhere on werelist and gamefaqs messageboards.
by Mundane Shawn March 13, 2005