There are many different
definitions for the term transgenderist. The one I'm giving here is the one as it's used often by
Dutch transgendered people: a person who is somewhere inbetween
transvestite and
transsexual. This could mean someone who is physically
male but chooses to live life in
female clothes, or even someone who has decided to take
hormonal replacement therapy, but not to go for the complete
sex reassignment surgery.
Transgenderists come in many different flavours.