She follows a semi-vegetarianism diet, which allows her to eat some meat occasionally.

She follows a semi-vegetarian diet.

She follows a semi-vegetarian diet, which means she occasionally eats meat.

There are many demi-vegetarians at the party.

I love eating vegetarian hamburgers.

I ordered a delicious vegetarian burger for lunch.

I love eating vegetarian burgers.

Many people embrace vegetarianisms for ethical and health reasons.

I'm a vegetarian.

Many ovo-lacto-vegetarians enjoy a variety of plant-based foods.