Can reference someone who is gender diverse or gender non-conforming, a variant is a term that applies to anyone who does not have a cisgender identity. The term has courted controversy in the past as it entails that genders that do not conform with the traditional two-gender system are abnormal.
Terrance: “I'm not male or female, I identify as a Variant.”
Katie: “Oh, so you're gender diverse?”
Terrance: “Yes I am, I refuse to be defined by an outdated gender binary.”