Laidirifluid is a subset of genderfluid where one is fluid exclusively between atrinary genders like xenogenders, xenic genders, and outherine genders. Their gender would never encompass genders at all related to the three common concepts used to define "standard" human genders- male/masculine, female/feminine, and neutral/null. A laidirifluid person would never experience genders related to being male or to being masculine, female or feminine, any genders in between female/feminine and male/masculine, or being neutral/null. They would experience genders like xenogenders and outherine genders like aporagender and maverique.
Laidirifluid people would also never be genderless, as genders like genderless and agender are associated with nullity and neutrality, which are trinary concepts. So, laidirifluid people are genderfluid and always have a gender and a sense of their gender, but that sense is never within the gender trinary. They may experience non-neutral abinary genders as well as anonbinary and anontrinary genders, but they never experience genders within the gender trinary.