Green’s Dictionary of Slang

essence n.2

[ecstasy n.]

(drugs) MDMA.

[US]ONDCP Street Terms 9: Essence — Methylenedioxymethamphetamine (MDMA).
[US]Community Counseling and Resource Center 🌐 ‘Designer Drugs’: MDMA – Ecstasy, WTC, Adam, Essence, Decadence and M & M.