UPDATE : My friend and I slowed down the part of the song that everyone's been mishearing and it is indeed sung in Indonesian. After hours of close listening and slowing down and using translators we finally figured them out!  "We Partynauseous 'cause ma's sita suh buta mau nya"  This is either exactly correct or at the most, very slightly incorrect. Buta is heard as 'butha' because in Indonesian, 't' is pronounced as a 'th'  in ENGLISH that translates to :  "We Partynauseous 'cause the Supreme