Terminology
The term "trans man" is used as a short form for either identity (transsexual man and transgender man). Trans men may identify as transsexual, as transgender, neither, or both. "Transgender man" is an umbrella term that may include anybody who was assigned the female sex at birth but identifies as male. For instance, some drag kings, cross dressers, androgynous, bigendered, and genderqueer people might identify as transgender.
Transsexual is a term which originated in the medical and psychological communities. However, unlike the term transgender, transsexual is not an umbrella term, and many transgender people do not identify themselves as such.
Sometimes the term "new man" is used to identify a post-operative transsexual man.
The FTM community has coined the phrase transfag to describe a trans man attracted to other men. However, this phrase is still controversial because of its previous usage as a derogatory slur directed towards trans women.
Read more about this topic: Trans Man