气自华

Meaning

Abbreviation of 防弹牛逼 (Fángdàn niúbī, "BTS is awesome/badass"). A fan circle term. 防弹 is short for 防弹少年团 (BTS - Bangtan Sonyeondan). Used by fans when BTS wins awards or releases new albums, expressing great pride. Note: In biochemistry, FDNB also stands for dinitrofluorobenzene.