A faggetron means fagget, but it is much more fun to say and is just a sick word. Faggetrons can be anybody, from gay nerds, to sonnenbitch, to searsbitch, to deedles a.k.a eedles, to glick, glick's little brother (who I heard can whoop his ass), a faggetron is anybody who is acting in a faggety sort of way. You can also add numbers on the end of it like "faggetron 3000" for instance of "faggetron 3 million", they all work and are all funny.
Electronic music that emobodies the gay male community. It's usually rump-shakin', 80s or synth heavy. IE new Madonna albums, trance, Tatu, prog house, etc.
Can be used negatively or positively depending on the situation. See examples.
1. The music they were playing at the club was pretty faggetronic, but I had a swell night.
2. The new Cut Copy album is totally faggetronic! I love it!
caveat: this recent word and its corresponding definition naturally transcends the traditional definition of fag, and no longer refers to homosexuality.
Get with the times, people!