How to say popular social insider in Korean
Korean: 인싸[ in-ssa ]

Meaning
In Korean slang, 인싸 means a person who is popular, outgoing, and good at being part of the group. People use it for someone who makes friends easily and seems comfortable with others. It is common in casual speech, especially among young people.
Example sentences
민수는 학교에서 인싸예요.
Minsu is popular at school.
새 반에 가도 지연이는 금방 인싸가 돼요.
Even in a new class, Jiyeon quickly becomes popular.
우리 형은 누구하고도 잘 말해서 인싸 같아요.
My older brother is really good at talking to anyone and seems like an insider.
쇼핑몰에 가면 수진이는 직원하고도 잘 말해서 인싸 같아요.
When we go to the mall, Sujin talks well with everyone and seems very social.
