Chingu: friend
Daebak: win/jackpot/awesome. Used when something is a winner or incredibly amazing
Deh: yes (see Neh/Yeh)
Dongsaeng: younger person/sibling
Fandom: fan club
Fighting: cheer for good luck and encouragement. Also sometimes written as "Hwaiting"
Flower Boy: male with youthful features. Typically tall, thin, and more feminine/striking features