A newly-converted vegan who now believes that the whole world must be converted because he/she has "seen the light". This person is characterized by one or more of the following: 1) Capitalizing the word vegan, 2) Getting a vegan tattoo to show the world just how "vegan" they are, 3) Wearing vegan shirts, 4) Applying vegan stickers to their car. They are of course the equivalent of the Born Again Christian who gives all other Christians and in this case vegans, a bad name. Finally, they make it their life's purpose not to just try to save animals, but to make sure EVERYONE knows about it.
"Hey, did you invite Sally to the protest?" "I didn't, she's a total born again vegan and I am afraid she'll just push people away. She actually hurts the cause now".