1) A meteoroid that is visible from within the earth's atmosphere.

2) A girl, particularly of privileged background, who is hooked on drugs. Typically insecure and unstable, a shooting star tends to suffer from severe intimacy difficulties, being unable to lead a steady love life due to her addictions.

3) A song written and recorded by Elliott Smith that appears on his posthumous 2004 album "From a Basement on the Hill."

A girl who has short and insincere relationships, moving quickly from one partner to the next, stringing people along and breaking each person's heart as she goes. After the Elliott Smith song, "Shooting Star."
Often, though, a shooting star can't help her behavior and, while she is largely unaware of its consequences, does it out of personal confusion rather than malice.