The lowest of the low coach class bitch, typically spotted in low income neighborhoods selling their stink pipe for a quick 5$ you can usually identify them by their pick marks and lack of teeth.
Quite simply, a word burner is someone or some group who wants to ban words they disagree with. They will attempt to ban words outright or they will attempt to change the words meaning, claiming only they know the meaning of words.
Similar to the book burners of the past and present, word burning is a more insidious form of censorship. Not allowing you to read something is one thing, not allowing you to say something is a whole new ball game.