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A person who is otherwise vegan, but is ok with consuming some bivalves (oysters, muscles, clams) under certain conditions.
Jaylen's an ostrovegan, so he'll happily eat oysters.
by Sierra Thoreau December 28, 2017
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The feeling a trans person gets when he/she/they are able to start presenting as the gender they identify as and people start treating them accordingly
When they used my proper pronouns, my gender dysphoria became gender euphoria
by Black_berry September 13, 2018
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2
A vegan who finds an excuse for eating oysters by claiming oysters belong in the plant kingdom instead of the animal kingdom. Ostrovegans do not eat any meat or animal byproduct like milk, cheese, honey, etc. except for when it comes to oysters based on the idea that oysters probably do not feel pain.
Guy: These bivalves look delicious.

Girl: I thought you were vegan?

Guy: No worries, oysters are basically plants. I'm ostrovegan.
by lilspiker January 01, 2017
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