to like or dislike something.
comes from the facebook fan pages, where someone can become a fan of something (for example: John Smith became a fan of Turning the Pillow Over when it Gets Too Warm.)
"my friend bought the new xbox."
"i'm a fan."
"ellen? she's cool, i like what she says to the contestans on idol."
"i'm not a fan of ellen; she can get annoying."
: A hater. Someone that talks negative about something you do or have done.
Hey Jim, Erica said your party was boring last night. Jim says "Erica is just A FAN" while Jim smiles with a wink ;)