It stands for Pussy Inflation, and it refers to an epidemic going on in America right now where each year it feels like a man has to lower his standard, because the
woman of the attractiveness level he used to be able to hook up with or now only interested in more attractive men (taller, richer, more
buff, etc)
This is happening because apps like tinder have made it easier for chads (super attractive guys) to cheat on their gfs and have side chicks. So a girl who's a 7
will get to hook up with a
guy who's a 9, who has a gf but is cheating on them and is only hooking up with her because she'
s easy for him and he just wants some fresh pussy. This
will happen a few times with a few different guys, and over
time it
will warp her perception of what's "good enough" for her. For example, If she used to hook up with guys who are 5'10" or above, now she only hooks up with guys who are 6'2" or above.