Porn Site Transmitted Disease-- computer virus acquired through contact with multiple porn websites.
Damn, I was watching this hot girl on girl scene on the web, and the next thing I know, I've got a PSTD!
by Tabgirl November 10, 2008
The Self Realization and exploration of the acronym if that is the correct word, nevertheless you Overstand. >"PSTD" stands for "Pussy,Stressed, Tired&Depressed" .
by Ancient Wetness December 30, 2016