To dream of lemonade represents beliefs or situations that help you to relax or calm down. What you do to stop being bothered or upset. It may also reflect something that allows to reduce the severity or difficulty you have with a problem. You may have had had an altercation with a person, or experienced a disappointment of some kind. represents how you choose to get over it or move on.
If you dream of dirty or poisonous it reflect processing of negative issues or bad experiences in an unhealthy way. You may be making yourself feel better by ridiculing someone or planning revenge.