One who only eats happy meat. Often mistaken for a vegetarian, but these folks have no hard feelings about eating meat, as long as it's free-range, grass-fed, organic, happy meat.
I take Channukah and Christmas off 'cause I'm Holitarian, baby. NNNNGGGH. Did you hear that noise? That's the sound of TIME OFF. NNNNGGGH! YEAH IT SOUNDS SO SWEET.
herpetarianism means keeping reptiles and/or amphibians as pets; the word derives from herpetology ("knowledge of creeping things"), the scientific study of reptiles and amphibians.
You should see his house; he keeps snakes and frogs in every room! He is really into herpetarianism.