The blue wave 

The splash back you receive when taking a dump in a freshly cleaned Porta-potty. Often experienced by construction workers.

"Man, I just got hit by the blue wave"

The blue wave by Crispy boys March 24, 2023

ride the blue wave 

to go out drinking without much money, or to be with friends who are drinking when you cannot be drinking. The term comes from when funds are low and one must theoretically resort to other resources of alcohol (such as mouthwash) to get a buzz. Note this term does not imply drinking said mouthwash.

1: Would you like to go out drinkin' tonight?
2: No, I've no money. I'd be a fifth wheel.
1: Don't matter. Just ride the blue wave with us anyway, man.

ride the blue wave by perlcub May 13, 2009