1. a girl, who, like a groupie, hangs out with a certain group of rock stars. however, unlike a groupie she's "there for the music" and is a true inspiration to rock and roll. she also supposedly refuses to sleep with rock stars and claims that groupies only do so to be near someone famous. penny lane from the movie almost famous is the quintessential bandaid.
2. in metaphorical terms, a girl who hangs out with a certain fraternity. unlike fraternity groupies, whom the brothers tend to loathe, she does not sleep with the brothers, aka, the rock stars. she has been known to, on occasion, give a boy a blow job. she is an inspiration to the brothers, and when she is not around, her presence is missed, for she is quite a precious asset to the boys.
girl 2: well, i've got my eye on that hot drummer over there. what about you?
girl 1: there's a fratastic guitarist up on the stage that i'd just love to go home with tonight. but i'll behave...as always...
A Band Aid is an attractive/very sexy Band Groupie that has been invited to travel with a band group in their buss or plane in place of furnishing her own transportation to follow the band from city to city and is furnished food and clothing in exchange for sex with the band members and roadies.
Reference to Band Aid is mentioned in the movie "Almost Famous".
2. You gave me a band-aid, I put it on my heartbreak