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!