A psychonaut is someone who dabbles in pharmecuticals not categorized as illegal by Medicines and Healthcare Products Regulatory Agency (MHRA). There are amateur chemists with clandestine laboratories that create legal versions of MdMA, LSD etc etc. Basically they stay one step ahead of the Medicines and Healthcare Products Regulatory Agency (MHRA), by creating new uncategorized drugs. Once Medicines and Healthcare Products Regulatory Agency (MHRA), cop on, they then change the recipe!
Not the safest thing to dabble in though is it!?!?!? Freaky, mind bending chemicals made by someone in their garden shed.