Gomawo: Thank you (informal)
Hoobae: person who is your professional junior (Ex: 2NE1 is Big Bangs hoobae since 2NE1 debuted after Big Bang)
Hwaiting: cheer for good luck and encouragement (written this way since Koreans have issues with "f") Also written as "Fighting."
Hyung: literally means "older brother." used by males to refer to older males/brothers. Usually if the person uses this term, it means they are somewhat close to the other individual *not always*
Kamsahamnida: Thank you
K-Pop: Korean popular music