Top definition
A site which contains bitchy comments about other people, including but not limited to friends, peers, celebrities, politicians, etc.
In a 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 burn book online as the name references does not need to be a physical book but can be a website such as urban disctionary or It really just needs to be a website to talk crap.
by Sir Burner June 02, 2009
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