A person (historically used to refer to women, but the word means both men and women) who has an abnormally high sex drive and craves sex nearly all the time.
Hypersexuality: a female whose sex drive is obsessively high. Considered a mental illness, coloqiually means a horny girl. Not to be confused with slut or skank where one's sexual dignity is pathetically low, nymphomania is simply related to an abnormally high sex drive.
adj. - This is a term used to describe a band girl that mainly plays a wind instrument, however, she blows "other things" very well. She is addicted to sex just as much as she is committed to her music. They love to use their instruments on their partners in bed, but it is highly unlikely that they would admit to this due to it being frowned upon by their conductors and result in bringing about shame and disgust reflecting on the entire band. Symphos are known for giving the best, most unbelievable head, but because this type of girl is very rare to come across, most guys will refuse it knowing that head from any other girl will feel downright unpleasurable.
Holly: "Why haven't the fireworks started? The symphony ended ten minutes ago."
Cal: "There must be a sympho in the band."
Larry: "Man I got head from a symphomaniac once, let me tell you that is simply the best feeling in the world!"