야민정음

 refer : https://ko.wikipedia.org/wiki/%EC%95%BC%EB%AF%BC%EC%A0%95%EC%9D%8C 

야민정음은 야민정흠.이라고도 하며, 

야민정음 Yaminjeongeum (野民正音) is an internet meme that changes the shape of Korean letters to spell words differently. 

Representative examples include

댕댕이 Ddaengdaeng E  <-- 멍멍이 Mung Mung E (Dog) 

띵작 Ddingjak <-- 명작 Myung Jak (masterpiece)  

괄도 네넴띤 Gwaldo Nenemtin <-- 팔도 비빔면 Paldo Bibimmyeon

When a website filters profanity, it prevents posts from being published, so some people change their profanity to avoid this.

야랄났네 <-- 지랄났네

씨발 <-- 야발

섹스 <-- 스섹

It is also used to compress it into a single character. 

돌돔 --> 뚊 

고기 --> 꾀 

부부 --> 쀼

It can also be rotated 90 degrees to the side. 

비빔밥  --> ㄸ뚜ㅁ뜨뜨