pussy tightness retention, a common term used for females who have small vaginal orifices. They are generally more successful in keeping a spousal partner because of their coital abilities.

The common belief is that women with larger shoe sizes have better PTR. This is a scientifically investigated fact.

A short form of pointer when speaking about the C programming language. It can also be a nickname for someone called Peter, since when pronouncing the letters of "ptr" one and one, it almost sounds like Pe-te-r.