A guy who finds himself pretending to be someone he is not, to obtain closeness with a desired member of the female species. Typically comes off as cool in a group, but eventually cannot keep up with the false image of himself which he painted for the female he is courting, which results in termination of both the relationship, and his stupid head.
"Watch out, that P.R. might make you believe....just don't listen to him."
Pussy Restriction. When a straight man or bi/gay female does somethingwrong and gets no sex as punishment
Man comes in later than he promised his gf/wife, forgets gf/wife birthday, gets caught looking at a hot chick other than who he's with, or something of the like.
The woman gives him just a look that tells him 'You're so on P.R. '
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).