Acid coded means: Describes someone or something that has a naturally trippy, chaotic, or reality-bending quality without necessarily involving drugs. Vibes that are kaleidoscopic, unpredictable, or just slightly off. It has drug-related associations; worth a calm conversation about which side of the topic your teen is on. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.