|See also:||Zinosaur, Bitter Old Fanfic Queen, Old School, The Good Old Days|
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Fanosaur is a term for a long-time fan. As seen in the examples, what qualifies as "long-time" varies from fan to fan. It is often ironically self-applied, but some fans also feel that it's used by younger fans as a pejorative label.
Examples of Use
From Swellison: "I am a fanosaur –a new term for an ol--er, long time fan.;-) Over the years, I've written a few stories in several different fandoms, but my three main fandoms are The Professionals, The Sentinel and Supernatural. The Sentinel is the reason I broke down and bought my first computer in 1997, before that I was a zine-based fanwriter." 
From Solomon Trimble: "I was aware of the huge online fan base of Twilight before I started filming. My sister in law and all her friends were big fanosaurs, way before I was cast [as Sam Uley in the Twilight movies]." 
From LJS, a Life on Mars fan: "I get the impression that newer fans don't have a clue what a drabble started out as. Just like they don't know what slash used to be. But what the hey, I'm a fanosaur."
Other TermsFan Hag:
Old Trekker:"ok, you retain the label of fan hag until we can get someone from before 85." 
I had a dream the other night. I was sitting at a desk with piles of zines around me looking at a TV camera. On the wall to my left was a giant ticking pocket watch. I picked up Naked Times 3022. "Don't you just hate it when there is a 1.5 inch margin, a half in border and another half inch margin? There's less words per page here than there is in Curious George Rides a Bike."
Then I picked up Liasons II: "Don't you Just hate paying $20.00 for a multimedia zine when you only have one media interest? Does the world need a Voyage to the Bottom of the Sea story? I think not." "Don't you Just hate it..."
I woke up in a cold sweat. I was ANDY ROONEY. That whiney, irritating, reason I never watch the last 10 minutes of 60 minutes. Could this be? Unfortunately, my net-friends would probably say, yes. On slash net, I've had the distressing habit of prefacing things with, "Ten years ago..." or "When we first published OUT OF BOUNDS..." .Then it hit me, I was in the midst of a post adolescent midfanlife crisis. Worse than that, I was becoming something I had ridiculed only a few short years ago, AN OLD TREKKER. In this multi-media age, you don't need to be a Trek fan to be an OLD TREKKER. Being an OT is a state of mind. 
- Swellison at fanfiction.net, accessed 12.7.2010;reference link
- Melody C.'s Live Journal, accessed 12.7.2010; reference link
- twilightnovelnoice.com accessed 12.7.2010; reference link
- The Railway Arms Forum post "Post S2 Ep8 Fanfic Recommendations?" dated August 9, 2009; reference link.
- a fan in 2006 comments to another at When we were newbies... a reply to St. Crispins
- from Lezlie S in Strange Bedfellows #1 (May 1993)