n. A restless feeling. A non-descript feeling of boredom, restlessness and confinement. A feeling one has when wanting to escape from responsibility (chiefly emotional) by travelling. Sometimes synonymous with 'wanderlust.' The desire to travel in order to escape an emotional commitment.
"Waiting for the early train, Sorry boy, but I've been hit by purple rain." -America (Ventura Highway).
An expression of feeling or emotion brought on by the memory of a regretful action or loss, resulting in the personal knowledge that what has transpired cannot be corrected or undone (inspired by the popular 80s Prince song):
Joe - "Remember that girl I dated before?"
Mack - "Yeah, why?"
Joe - "I should have married that girl?"
Mack - "Nothing you can do about it now, Purple Rain man, Purple Rain."
Prince's autobiographical movie, produced in the 1980's. The concept was later ripped off to make Eminem's "8 Mile" and 50 Cent's "Get rich or die trying".