What do people mean when they say "Let it rain"?

Question

ie

"Let it rain, I'm makin' it snow."

"Wanna take you out, and let it rain..."

"I let it rain, I let it rain..."

etc.

Okay. Is it just a trend, or is it supposed to mean something?

Answer 1

It's just a phrase for having abundant money. You've got so much you could "make it rain" with money.

Answer 2

let it rain means the money get money let the money come falling in and snow is the way to get the money use ur imagination

Answer 3

Calling money.  

Answer 4

'good luck' or a humourous observation