Potterbait 

Someone who is not regularly hot, but bears strong resemblance (physical or any other) to a character in the Harry Potter series, thus making them attractive to fans.

Whoa that girl looks exactly like Ginny Weasley. And she's my best friends sister. Such Potterbait!

Potterbait by Matt Coon August 29, 2007

Pottermatum 

Forcing a girl to make a choice between two ultimatums;
Stop being best friends

Start dating eachother

He was her best friend before he gave her the pottermatum

Pottermatum by ldm9two March 29, 2020

Potterathon 

To watch all the harry potter movies over one evening often finishing early into the next morning whilst actively engaging in off hand wizarding duels and studying for your owls. (wearing the appropriate Hogwarts attire)

Sorry I can't hang out tonight I'm having a serious potterathon.

Potterathon by harrypotterissuperbeastbro July 11, 2011

pottercast 

A podcast broadcasted by the Harry Potter fan website www.the-leaky-cauldron.org. It features the latest in Potter news, books, films and much more. It is the only place to hear interviews with Harry Potter cast and crew, and often features Harry Potter news that goes unreported elsewhere. The show is hosted by Melissa Anelli and co-hosted by John Noe and Sue Upton. Each week features a wrapup of the latest in Potter news, news analysis and discussion, interviews with fans, discussion of a Potter topic from our moderators, voicemails and emails answered in the mailbag, and interviews with the people who create the HP books and films.

www.pottercast.com

I listen to Pottercast on my IPod.

pottercast by Pottercaster February 19, 2006

Potterites

The lovers of the Harry Potter series by J.K. Rowling.

see:
Harry Potter
J.K. Rowling

Being one of the ultimate POTTERITES, I waited for 2 hours in the rain for the arrival of the 5th Harry Potter book.

Potterites by Tessa the Great December 11, 2003

Posterbait 

the act of posting a vague statement to Facebook or Twitter that invariably forces friends to respond with comments that beg for more information to explain the backstory of the original post.

She constantly posterbaits from her iphone with comments like "I can't believe that just happened..." Why can't she just say what "it" is to begin with?!?!

Posterbait by Sam Sharpe August 29, 2009

posterbate 

To sequentially post in a message board forum by oneself.

Many users of RD like to posterbate in the Games forum.

posterbate by lauracs June 13, 2008