look up any word, like fleek:
 
1.
A book which contains bitchy comments about other people, often friends, school mates, etc.
Person 1: OMG! Shes such a bitch, i can't believe she slept with my exboyfriend, what a slut!

Person 2: Let it out, put it in the burn book
by Jonathan Irvine April 18, 2006
 
2.
this is a burn book. urban dictionary has became a burn book if you haven't noticed. only worldwide. pff
-urbandictionary.com
-public restroom wall
-what you're reading right now is a burn book
by bobis August 19, 2007
 
3.
(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!
by Ave Satanas676 December 22, 2008
 
4.
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.
by jwill101 September 12, 2010
 
5.
a book where girls write bitchy, rude, horrible things about other girls that may or may not be true.
burnbook: kim is a fat ass DYKE!!!!
kim has a fat ass nd shes dresses like a man
by realeyes 282 December 08, 2010