A vegetarian who just cannot stop annoying everyone around him. They constantly try to force their vegetarian "beliefs" on everyone else, even going so far as to RUIN a perfectly good BBQ with friends because everyone worries about bringing vegetarian-friendly food just to make them happy. A Vegetardian is a close cousin to the Catholics.
"God, I used to drink Pepsi but switched to Diet Pepsi Smif still won't shut up about Aspartame being poison! And the other day I was talking about the Bees dying all over North America and Europe and he said something about genetically modified foods! He just went on a long rant on IRC about Bovine Growth Hormone! What a vegetardian."