A person of visually ambiguous gender. It is difficult to tell whether this person is a male or female just by looking at him/her. It is a combination of "male" and "female."
"Hey, did you see him, er... that person over there?"
"Oh, that flat-chested and muscular person with a beautiful face and a ponytail?"
A male member of the human species that is so, irreparably beta that "beta" is too masculine a word to describe, but not feminine enough to be considered a female, as they are also subservient to women.
The disquieting awareness that someones importance to you, may not match that or your importance to them. That your best friendmay only think of you as a mate, that someone you barely know may think of you as a mentor, that someone you love unconditionally, may have one or two conditions.