The texture and fold of the skin located on the back of someone's head. Usually only observed after a fresh hair cut or shave. Generally found on Hawaiian locals due to the sun and humidity. Not to be considered as a negative, or a deformity, purely a unique physical trait.
"Wow that haircut is so fresh! Really showcases that sweet Hawaiianhead pussy! Honestly that makes me horny"
When taking a bath with your sister. You splash water on her face. As she’s wiping off the water you squirt head and shoulders onto her genitals. Then you viciously rub your head on her genitals to clean your hair.