Fireing off double middle fingers at the responsibilities we have, in turn letting them rage. Like squirting lighter fluid on the fire that is our lives.
Imagine your workspace is completely full of files you have to sort out. now, instead of filing the files on your desk you say fuck it, and fake your own death and never worry about files again.
Guy 1: hey Bill, do you wanna hit the gym with me later
Bill: Nah, I'm letting it rage
Frankie: Yo Bill, did u finish your taxes yet?
Bill: No way dude, I'm letting my taxes rage this year
When a Girl Finds you attractive, but you don't feel the same way towards her, Derived from when Some Girls say;
"I'm falling for you, Catch me?"
At this point, if you don't feel the same way the best option is to Let Her Fall, However, this does result in hurting the Girl who has Fallen for you, and could ruin future chances with someone, it is also quite a Dick Move too.
Brian; "I heard Tracy wants to be your Girlfriend?"
Elliot; "Yeah, I don't feel the same way about her Though"
Brian; "Perhaps the best thing to do, I know it sounds Dickish is Letting Her Fall."