1 definition by Kyliе Jennеr
P9 is a very commonly used word that is used to describe how long a male's penis. P9 is referred to as a very large Penis and 9 refers to the size 1 being the smallest 9 being the largest.
When I saw KJ and he showed me he's massive penis it was a P9 and it was the biggest I've ever seen.
by Kyliе Jennеr January 2, 2021