PP, a word that is more popularly knows as penis/dick/lund in india. People use it to abuse each other in india. One of the most popular is
Behen ke lund i.e(sisters pp)
Most of the times this word is enough to offend someone. There have been many fights starting with this word in many parts of world.
Boy#1: sup bro did you like the fat L today?
Boy#2: stfu bloody sisters pp