TPSI - (Titties Per Square Inch) -
In reference to a website, that is deemed pornography, but may not be pornography, based on the TPSI ... if there is a small amount of TPSI, then it may just be a basic site, with some titties....
Guy 1: "So they are installing some web filtering, and want to block pron sites"
Guy 2: "But how can they determine if the sites pron or not"
Guy 1: "IDK I guess they use TPSI"