An it/its lesbian or itsbian refers to a lesbian who uses it/its pronouns but is still a woman or is non-binary. The term is used by people who are wlw (sapphic) or nblw and use it/its pronouns. Those pronouns can be exclusive or one can be multipronoun. It is a more specific form of pronoun non-conformity and crosspronoun usage.
It is unknown when this term was coined, however it has been used amongst the community for many years alongside terms such as he/him lesbian.
The it/its lesbian flags were coined by Tumblr user ultbee on February 3rd, 2019. They have no confirmed meaning.