A person who posts on the popular former *NSYNC messageboard the JJB. In order to become a JJBer, it is encouraged but not required to be (but not limited to being) an attention whore, 32 year old virgin, have an IQ of 48, have multiple personalities, a vivid imagination, post controversioal topics just for results, or any other variety of annoying behaviors or characteristics.
A girl with meat hanging from her vagina? A young man named Steven who poops from his penis? A 'homeless' scam artist with a crooked nose ring? Just a few of JJB's finest JJBers.