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1.
Your classic mega douche who refuses perfectly good food on account of class 1 assholery. A douchetarian will find any way they possibly can to be a douche in any and all circumstances adhering to the principles of douchetarinitism.
Fuck that douchetarian. Let's troll him.
by Troll Master General November 16, 2011
 
2.
Somebody who harasses someone for being a vegetarian, even though said vegetarian doesn't shove their dietary habits down anyone's throats.
I didn't even say anything, and he was all "Hey, you know what would be great on that salad? Some VEAL!" What a douchetarian.
by 'Rixx March 01, 2009