Suptiliasexual, also known as suptili-ace, or suptilic asexual, is a term referring to someone who is purely asexual, not grey ace or elsewhere on the asexual spectrum. A suptiliasexual person has never, and will never feel sexual attraction. It is similar to omniasexual, but Suptiliasexual people may be okay engaging in discussions about sexual acts.
Etymology
Suptiliasexual comes from the Brazilian assexual estrito(a/e) which means "strict asexual". In Brazil the word asexual is an umbrella term for the entire spectrum. Someone fully asexual would be assexual estrito(a/e). In English these people would usually just be called "asexual" however, the term suptiliasexual is useful for when differentiating between suptiliasexuals and other asexual spectrum people.