There is literally only one definition for make it rain. It means to throw money into the air and let it fall in a motion that mimics the rain. Hence make it rain.
I just won the lottery so I'm going to make it rain at da club so all da bitches want me.
The state of being of dryness, where one is incapable of dropping rain, or has flawed rain. Best used in the context of Beer Pong.
"Iain your are lacking rain so bad - your shot is flawed and you cannot hit a cup."
"Ew my god get off the altar with that flawed shit lack-of-rain of yours, that is fucking disgusting."
"Bro you like the tha Sahara the way you lack rain bro."
When shit is just overly crazy and uncontrolled.
Daquan, these bitches be getting white girl wasted up in that bitch, shit is raining sideways.
Purple is the color associated with royalty and the word "rain" is a play on or PUN of the word "reign." Therefore, "purple rain" means "royalty reign." Moreover, when one is in the purple rain, that one is in the HIGHEST state of consciousness such that only happiness exist in their state of mind. This allows the flow of Life, Source Energy, Infinite Intelligence aka GOD.
"I only want to see you laughing in the purple rain." Prince, The Artist
When a series of people say "douche," hence forth making it sound like it's raining douches.
Guy 1:"Dude you're such a douche!"
Guy 2: "Doucheeee"
Guy 3: "Doucheeee"
Guy 1: "Doucheeee"
Guy 2: "It's raining douches!"
When you sneeze from a high vantage point and rain a fine mucus based mist on some unfortunate fellow
"it is sneeze raining cats and dogs"
"He sneeze rained on my parade"
It's usually used in Twitch.tv chat when a popular song from the game "Osu!" comes up and that song is worth alot of "PP" (in Osu!, PP is like a ranking system).
(The song "Highscore" comes up) "OHHH PP RAIN"