Transfluid is a gender identity where one identifies with fluid gendered feelings. They can be assigned any sex at birth. Transfluid people can also identify as other, non-fluid genders as well, though typically one's fluid identities are more significant that one's non-fluid identities.
Transfluid may also be used to describe one who transitions to the opposite sex, but sometimes they may feel like their birth gender.
History
The term transfluid has been coined two times, once by chemical-swirls-in-your-brain on Tumblr, the second time by DeathByGlamourrrr on the LGBTA Wikia. The first transfluid pride flag has no confirmed meaning. The alternate transfluid pride flag is a combination of the transneutral pride flag and the genderfluid pride flag