Unvegan

Lactic acid: a byproduct of both animal and plant metabolism, so it’s not always unvegan; found in some fermented foods and body care products.

Source: wiktionary

Since “steak knife” sounds really “unvegan” we'll call it the “seitan knife” for now.

Source: wiktionary

I first made this recipe in the very unvegan Flagstaff, Arizona, for a dinner party attended by 80 percent omnivores. […] Inspired by an original most unvegan recipe by Emeril Lagasse and Jessie Tirsch.

Source: wiktionary

Even the tiniest bit of chometz would render the water unusable. (That’s similar to how using the tiniest bit of animal product would render a person completely un[-]vegan in some people’s eyes.)

Source: wiktionary