STP
noun
RareNot in standard dictionaries
1
Initialism of sewage treatment plant.
2
Initialism of standard temperature and pressure.
3
Initialism of spanning tree protocol.
4
Initialism of shielded twisted pair.
5
Initialism of stand-to-pee.
6
A hallucinogen (2,5-dimethoxy-4-methylamphetamine), chemically related to amphetamine but with LSD-like effects.
#slang