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1.
When somebody gains access to another's Facebook account and commits acts of terrorism and sabotage to their status or information (eg. gender, sexual preferences etc.) Usually changing it to something embarassing and/or derogatory to the person whom created the account, or to something misleading.
Some examples of 'terrorbooking' are:

(account owner's name) has decided to spend his Christmas bonus on that sex change operation that he/she has always wanted!

(account owner's name) felt the baby kick! (Something like this would only be used if the said person was not actually pregnant, leading to a bombardment of questions from their friends about the baby, as well as asking why they hadn't heard about the baby before now, what was the baby's gender, how far along is she, etc.)
by Xombified February 05, 2010