Another way of saying "to accept". Since the verb "to notdeny" consists of "not" and "deny", the final outcome is an affimation, which is an equivalent to "to accept" or "to admit". "To notdeny" is a transitive verb, therefore, you must add a direct obejct when using it. It could also be used a reporting verb.

A person who doesn't realize they are transgender yet, or is in denial; an undeveloped transgender person. When they realize, it's referred to as the "egg cracking."