Coke-waste is when you have a bottle of coke and won't give it to me!!!! D:
(Nah, I guess (one of the more extreme examples) is having a tasty bottle of coke, screwing off the cap and then pouring it out right in front of me while smiling like an evil maniac.. It'd tear at my very soul and turn me into a sad sobbing suicidal zombie-woof x-x)