It's my finals season right now so in honor of that let me teach you this slang~ ❤️
The first part of the slang 갓 (gat) stands for the english word "God" and 생 (seng) is the shortened form of 인생 (inseng) which means life! 😋
Basically, this slang means living like a "God" not literally but in the sense that you're life is impressive and to live a "갓생" means you're working hard and doing everything you should be doing 😎 (an impressive life)