wash your genitals (male)

A turtle's head retracts much like a penis does. During ultrasound examinations, male gender is said to be seen as the "turtle sign" because the penis looks like a turtle head and the scrotum resembles the shell.

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."