Post Fart Relationship. The point in a relationship when one is no embarrassed to fart in the presence of one's lover anymore. It signals a point in a relationship that a measure of romance has died. Does not apply to flatuphiles.
"Man, something small died inside of me last night. Jane cut one right in front of me last night without a word. Were now in a PFR."
"I guess Keith and I have been together for so long that the specialness of our love life is gone. Last night after sex, he rolled over and broke wind without an apology. Were in a PFR now."
"It sucks being in a PFR. I expect he'll start picking his nose in front of me and eating the boogers next."