A combination of the two words "Facebook" and "Raped", it is basically when you have accidentally left your facebook logged in with your friends about. They take the opportunity to write something either insulting or embarrasing on your wall, thus meaning you have been "fraped".
I accidentally left my Facebook signed in today, and my mate Jeff fraped me !
When someone goes into your facebook account and posts an unkind, contentous or controversial status message. Fraped is a shortened version of 'facebook raped'. An example of this would be 'John is currently deciding whether to wear his pink or blue dress to his transexual party this evening.'
I have just been fraped, please ignore my previous status, cheers.