Transgender is an umbrella term applied to people and behaviors which diverge from those of normative two-gender roles (male and female), usually assigned at birth. Transgender refers to the state of one's gender identity (male, female, or various other identities) and not to sexual identities, a common misunderstanding.
Transgender identities and expression have been a fixture of culture since antiquity. One example is South Asian, where Hijras (pictured at right) are considered members of a third gender.
A trans man or trans guy (often referred to as FTM) is short for transsexual or transgender man - a person who was assigned female at birth, but who identifies as a male. "FTM" (sometimes FtM, F2M, or F→M) is short for "female-to-male", and identifies the general direction of transition (from assigned to actual), and not a conscripted "start" to "finish" process. Some trans men reject being seen as FTM, arguing that they have always been male and are only making this identity visible to other people and sometimes calling themselves MTM, (short for "male-to-male").
The second child of George William Jorgensen Sr., a carpenter and contractor, and his wife, the former Florence Davis Hansen, Jorgensen grew up in the Bronx and later described herself as having been a "frail, tow-headed, introverted little boy who ran from fistfights and rough-and-tumble games".