A site which contains bitchy comments about other people, including but not limited to friends, peers, celebrities, politicians, etc. An online burnbook as the name references does not need to be a physical book but can be a website such as burnbook.com.
In an online burn book I was called me a stupid whore who sleeps with anything and everything, regardless of sex or species and dead or alive.
A term that originated from the 2004 movie 'Mean Girls'. It is a book the Plastics use to write nasty comments and start rumors/gossip about their classmates. Nowadays, it can be used to refer to any book that contains hateful comments about anything.
(Taken from Mean Girls) A profane book used to describe people that you have utmost distaste for. Contains a picture, name, and reasons for their entry.
Girl 1: Omg, did you see Veronica?
Girl 2: Like yeah! What a Bitch!
Girl 1: She's going in the Burn Book!
A Burn Book is a book where a person can vent out their hate/annoyance of others. It is similar to a diary but instead of documenting your day and/or feeling you are documenting your negative thoughts of others. A Burn Book will often contain Harsh comments and insults.