When you are in a strip club or party and decide to throw a bunch of money in the air to show everyone how rich you are.
Pac Man Jones told his crew to "make it rain", but before they could...someone stole the bag of $81,000...which later resulted in a shooting instead of them "making it rain".
by Pop Pop Pop February 27, 2007
When you're fucking a girl, you pull out and cum on her stomach/back and shout 'making it rain!!!!', like the G that you are!
by anon1993/1994 March 10, 2014