Those terms are not slang, but jargon and pseudoscience. The terms are autogynephilic and androphilic. In terms of MtF transsexual persons an autogynephile is attracted to the "woman within." They are likely to be "lesbian" after transition, and the motives seem to be fetishistic in nature. Blanchard and Bailey would consider asexual transsexual women to be autogynephiles as well. An androphile would be the "classical" transsexual woman who is attracted to males and have known early in life they had transsexualism.

I imagine you would reverse the labels for FtM, making them gynephilia (motivated by an attraction to women) and autoandrophilia (motivated by being one's own ideal of a man).