An Internet slang acronym with two meanings.

A. Same Time Post, when two people post a message at the same time to the second. Popular on message boards such as GameFAQs.

B. Second To Post, when someone posts posts second in a message board topic.
A. "Both of us posted at 9:13:06. STP!"
B. "New board? STP!"
by rklamer August 22, 2007
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Scientifically Tested Petroleum®

Petroleum company which makes products such as oil treatment and fuel treatment for automobiles.

Official sponsor of Richard Petty and the number 43 Plymouth NASCAR machine.
by Bitchin Kitchen August 15, 2003
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An old adage from the 1960s to the 1980s, during the Indianapolis 500 glory days of the partyin' Snake Pit in Turns 1 and 4, meaning to "Start The Party." Of course, this was before the evil Tony George took over the Indianapolis Motor Speedway and made it family-friendly.
Hey Joseph, when will they STP during the month of May at the Speedway?
by L. Smitherman May 25, 2007
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Sexually Transmitted Poop
"Dang...that boy's grimy. Hes got some STP."
by Eva Martin March 11, 2010
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signal transfer point

kind of a router in ss7 networks

it is responsible for transfer of different ss7 messages between ss7 nodes
a STP may send route set test messages to probe the availability of a particular SEP
by Str187 March 02, 2008
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