Big PP/Smol PP/Massive PP/PP/Peepee is a meme created by PewDiePie.
The meme consists of guessing the size of the PewDiePies's subscribers' "peepees" by posts.

The meme initially started in LWIAY, as a new form of rating in PewDiePie's channel, rating by, the size of the subscriber's penis, even if the OP is a woman.

The meme gained popularity, so the channel "Party in Backyard", made a dubstep remix of Felix saying "You all have big PP!" and "HUGE! PP!" (link shown below)

https://www.youtube.com/watch?v=b0Oux-sYXfg

(To keep it Safe for your Workplace, your School, or your home if you are underage (-16), I can't show any meme examples here)