A phrase Korean rap god Min Yoongi/Suga/agust D in popular South Korean boy band, BTS used in a free style rap.
Fangirl #1:omggg did you see min Suga genius jjangjjang man boongboong perform on stage yesterday?
Fangirl#2: Yes he was amazing!
A Korean slang for good, usually used by older people, loved by swag master Suga/Min Yoongi/Agust D from the South Korean boy band, BTS.