If vegans just said "vegans do not consume most animal products", then
that would be true, as would the statement "vegans do not consume the
products of nonhuman animals". But to say that vegans do not consume animal
products is false. Breast milk, donated organs, blood... and yes, even
semen, are all "animal products". And even with the revised definition,
it leaves open the possibility that Hannibal Lecter and Jeffery Dahmer could
be perfectly happy vegans ("people... the other white meat").

Vegetarian is an easy definition- it's a person who doesn't eat animal
flesh.