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1.
A person who becomes a fan of EVERYTHING on facebook and leaves you with hundreds of updates on their most recent fandoms.

The fan whore is conniving in that they have the magic ability to convince others to join in their fanning madness, until one day you log onto facebook only to find that you, along with five of your friends, are a fan of hot showers and getting hugs.

These, of course, are things enjoyed by all, so exploiting them all over your page makes you an utter whore.
Yesterday:
A became a fan of cupcakes!

Today:
Ten of your friends became fans of cupcakes!
B likes this.

Tomorrow:
C became a fan of i hate waking up in the morning.
B likes this.

The next day:
You became a fan of facebook should have a dislike button!

fan whore.
by nocomplaints May 03, 2009
 
2.
a person who is such a big fan, they often dream of whoring themselves out to whoever or whatever it is that they are so fanatic about.
My sister is one of Tom Cruise's biggest fanwhores.
by Nick Steinmetz March 23, 2006
 
3.
One step beyond fanboy or fangirl, a fanwhore is someone who is so insanely obsessed with something they treat it practically like a religion and will physically harm others who disagree with it.
Twilight fanwhore: "OMG TWILIHTGT IS LIEK THE BESTEST BOOK EVAR1!11! STEPHANY MIYER IZ A GENIOIS!111"

Sane person: "Twilight sucks ass, so shut up about it your retarded fanwhore"

Twilight fanwhore: "OMFG HOW FUKIN DAR U INSULT TEH GRAT GODESS STEFANIE MIYER I WIL FUKKIN KIL U!!11!"

*Twilight fanwhore proceeds to kick sane person in the balls*
by MISTER OWNINATOR December 21, 2009
 
4.
Individual who decides to be a fan of a particular sport, always chooses a team who is doing well in the sport when deciding which to team to be a fan of to receive instant gratification of fanhood.

A "fan whore" may be a bandwagon jumper, but they may also maintain their fandoom after the original winning and gratification wears off.
Bob is a "fan whore" because he became a fan of the 49ers (in the late 1980s), the Spurs (in the late 1990s), the Yankees (mid 1990s), Duke basketball (in the early 1990s), and Miami (FL) football (in the late 1990s).
by WillOh April 17, 2007