Mellow your yellow 

Chill out

It's just a game. Mellow your yellow already.

Mellow your yellow by SlyNick July 1, 2019

let your yellow mellow 

this is ANY action taken for one to release obscure things such as tension, stress, everyday odsticales that can bring a one down.

"dude, you need to let your yellow mellow"

let your yellow mellow by flower420 June 15, 2012