Annheyoung : Hi
Salanghae : I love you
Salagun : Love
Jagiya : Honey (pet name for partner)
Daebak : Awesome / great
Michyeso : Are you crazy?
Shibal : (It's a slang. Search it in Google to know the meaning. I am not saying it. Sorry if this was offensive)
Gwenchana : It's alright
And many more...
I also learnt a bit Japanese from @HighlyVolatile using few Japanese words now and then. I learnt Basashi which means Horse meat served as Sashimi from one of his opinion today.