From One Pill Can Kill, a document published in December by the DEA that purports to demonstrate how emojis are used in text conversations about drugs.
percocet and oxycodone: 💊 🔵 
🍌
xanax: 💊 🍫 🚎
adderall: 💊 A-🚆
dealer advertising: 🤑 👑 💰 💸 🔌
high potency: 🚀 💣 💥
universal for drugs: 🍁
large batch: 🍪
meth: 🔮 💙 💎 🧪
heroin: 🐉
cocaine: ❄ 🌨 ⛄ 💎 🔑 😛 🐡
mdma: 
⚡ ✖ 💊 🍬
mushrooms: 🍄
cough syrup: 💜 🍼 🍇
marijuana: 🌬 🔥 🌴 🎄 😯 🍀
