Codename for beer. You and your buddies wanna drink beer out in the parking lot after work and you can only tell em on an intercom. Or if you got an alcohol problem you wanna hide from your family or significant other. If they ask, just tell em it means blue berry soda or a blue smoothie. But don't get too close because others can still smell it on you.
"why no officer, I've only been drinking blue pop"
"blue pop in the parking lot after work!
"I quit alcohol *lie* I only drink blue pop"