| ECST | a stimulant drug that is chemically related to mescaline and amphetamine and is used illicitly for its euphoric and hallucinogenic effects |
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| ECST | a state of being carried away by overwhelming emotion |
| ECST | a state of elated bliss |
| ECST | feeling great rapture or delight |
| ECST | a trance induced by intense religious devotion |
| ECST | in an ecstatic manner |