You know how when you’re in the pool, and blowing water through a pool noodle, and someone turns the pool noodle backwards towards your face and it sprays you instead. But imagine the noodle is your dick and the girl you’re fucking turns you dick backwards towards you at the last second and sprays you with your own ejaculate.

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."