- a potent long-acting hallucinogen.
Origin of STP
First recorded in 1965–70; probably after STP, trademark of a motor-oil additive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- trademark scientifically treated petroleum: an oil substitute promising renewed power for an internal-combustion engine
- Also: NTP standard temperature and pressure: standard conditions of 0°C temperature and 101.325 kPa (760 mmHg) pressure
- Professor of Sacred Theology
- a synthetic hallucinogenic drug related to mescaline
from Latin: Sanctae Theologiae Professor Sense 4 from humorous reference to the extra power resulting from scientifically treated petroleum
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