Can also be reffered to as coke phlegm, coke cough, or pepsi spit.
when you drink coke or pepsi you will get a lasting taste of coke or pepsi in your mouth. For the next few minutes to the next half hour you will have coke spit.
When you spit it will be blackish coke colored and it will taste of pepsi or coke.
Bob drank a can of coke and when he was walking down the street he left a trail of coke spit
Mike drinks a can of pepsi
"dammit now i got coke spit!!"