Ninflexible, also called Flexininsexual or Flexninsexual, is a term for someone who usually identities as ninsexual, but whose identity/attraction is flexible. Most of the time they are attracted only to individuals who are non-binary in nature (regardless of their actual gender), but they experience occasional tendencies to be attracted to individuals who are not non-binary in nature.
Resources
1.https://beyond-mogai-pride-flags.tumblr.com/post/190739942680/fmn-flexible-flags