Official Definition: a person who identifies as gender fluid is a mix of both genders, and may feel more male on some days and more female on others. -Merriam Webster Online Dictionary (Link: https://www.merriam-webster.com/dictionary/gender-fluid).
Genderfluid: a gender identity label often used by people whose sense of self in relation to gender changes from time-to-time. The time frame might be over the course of many months, days, shorter, or longer, but the consistent experience is one of change. 2 adj. : a general descriptor for an individual's or society's ever-changing (i.e., "fluid") embodiment of gender, in the ways it affects us or we express it individually (e.g., someone might express gender fluidly), and/or in how it is socially constructed. -https://www.itspronouncedmetrosexual.com/2013/01/a-comprehensive-list-of-lgbtq-term-definitions/