그새 is a contraction of 그사이. 그사이 means "meanwhile, (in the) meantime". it was originated from 그(this)+사이(gap) Here is a translation of G-Dragon – 니가 뭔데 Who You? Baby I love you, I say this but I don’t feel good at all I want you I need you, I sing but I don’t know why I feel bad, who you? Congratulations, you already are meeting someone new I hope it works out, although it’s a bit early If you’re happy, that’s all I want But I keep getting angry, baby who you? Du du du du du du du du du du du du du Oh-oh-oh-oh-oh Du du du du du du du du du du du du du Oh-oh-oh-oh-oh Baby I miss you, why do I keep thinking about you I can’t meet someone else, I don’t want to Whether I love you or hate you I can’t determine, everyday I’m still confused I don’t know why I feel bad, who you You keep showing up in front of me with your arms locked to his This isn’t right, are you kidding me? Oh my? Enough is enough A pair of dirty flowers bloomed by the street Instead of the expensive purse that I couldn’t get you Instead of shoes I bought a pillow, wet with tears Uh why are you happy while I’m unfortunate Who you Du du du du du du du du du du du du du Oh-oh-oh-oh-oh Du du du du du du du du du du du du du Oh-oh-oh-oh-oh Baby I just want you back I want you back I want you back Baby I know it’s too late it Just too late it’s just too late Baby I just want you back I want you back I want you back Baby I know it’s too late it Just too late it’s just too late I pray for fight, pray for a break-up I always pray for you to come back to me Every neighborhoods every streets I visit and tell people that you two aren’t doing well So lame and loser-ish, I’ve always been a loser I didn’t know, you’re the same, you bad girl I will treat you better, will you meet me? I won’t bother you, will you please come back to me? Baby I hate you Baby I loved you Ma baby hate you Baby love you du du du du du who you?