Jellybitch is the owner/runner of jellybean.
She will go on random rampages and just banned you for no reason what so ever. Just to give you an example how crazy she is she once banned the word friend. But she can be nice sometimes. That is what Jellybitch means! So when you go on www.myjellybean.com and you see people refer to something as Jellybitch they are talking about the runner of the website or the people talking at that moment. But almost always it means the runner of myjellybean.