very rough sex
very severe diarrhea
very rough washing face
this word has 3 different meanings. so this word usually is used as a tool of pun on the internet. For instance, you say ㅍㅍㅅㅅ in order to mean ‘very severe diarrhea’ with also intend that people misunderstand it as ‘very rough sex’.
Definition by other languages
격렬한 섹스, 격렬한 설사, 격렬한 세수. 이같이 3가지 다른 의미를 가지고 있으므로 인터넷상에서 언어유희의 수단으로서 널리 사용된다.(korean)
아침에 일어나자마자 ㅍㅍㅅㅅ 를 했다. (this sentence means ‘I have ㅍㅍㅅㅅ today morning.’. you can think as 3 different meanings and so this word is used as a tool of pun.)