안녕하세요! (an-nyeong-ha-sae-yo) Can be taken as hello,goodbye, or if it's in the right tone, as a how are you? 감사합니다(kam-sa-ham-ni-da or kam-sam-nida as it is more commonly heard) means Thank You. 구맙습니다(ku-map-seum-ni-da) it means Thank You too but this one is Pure Korean. 밥 먹어서요?(bam-mogo-sseoyo) literally it means have you eaten rice? But it is most commonly understood as have you eaten yet? 네(nae/neh) Yes, I Agree, Yes?(when someone calls your name) 아니요(a-ni-yo) No, I disagree , Nothing(When someone asks What? or What did you say?) 갑시다(kap-shi-da) Let's Go when you are going to leave and want the group to follow you as well. 잘 가요( jal ga-yo) Goodbye. I'd use this around friends. For elders or superiors 안녕하... is recommended. 배고파요(pae-go-pa-yo) I'm hungry. 배 아파요 or 배가 아파요(pae ap-payo or paega ap-payo) My stomach hurts. 잘 먹게습니다( jal mok-kae seum-ni-da) Said before eating. Means Eat well or Have a good meal. 잘 먹어습니다(jal mok-keo seum-ni-da) Said after eating.Means I have eaten well. 누구이에요?(nu-gu-i-eh-yo) Who? Who is it? 언제예요? (on-jae-yae-yo?) When? 뭐예요? ( mwo/meo-yae-yo?) What? 어디에요? (o-di-ae-yo?) Where? 이곳(i-got)this 저곳(jo-got)that As for slang ㅋㅋㅋㅋㅋㅋㅋㅋ- similar to laughing ㅎㅎㅎㅎㅎㅎㅎㅎㅎ-same as above 헐(heol/hul) used like lol only in a sort of negative way. e.g. : friend1: OMG i'm so sexy friend2: 헐 화이팅/파이팅!(hwai-ting/paiting!) a sort of battle cry. Like WOHOO! 힘내!(him-nae!) Be strong 아이고(ai-go) used to display shock or dissapointment and even anger. 대박(dae-bak) Sort of like, Whoa! Wow! Jackpot! When something amazing happens or you are amazed. 짱 - (jjang) Best or cool.