neo-identity:

Neptunigender can be any of the following: 

• A gender related to the planet Neptune.
• A gender influenced by the planet Neptune.
• A gender influenced by a kintype to the planet Neptune.
• A gender related to the Greek God Poseidon or the Roman God Neptune.
• A gender influenced by one’s devotion to any of the aforementioned gods. 
• A gender that can be otherwise explained or identified using the planet Neptune.

Subsets of neptunigender include:

• Neptuniboy
• Neptunigirl
• Neptuninonbinary
• Neptuniagender
• Neptuniandrogyne
• Neptuni[gender]
• etc.

-ap