YOU SAID:

MY SISTER IS VERY DUMB AND IS A BIG, FAT IDIOT

INTO JAPANESE

私の妹は非常に馬鹿で、大きくて太った馬鹿です

BACK INTO ENGLISH

My sister is a very stupid, big and fat stupid

INTO JAPANESE

私の妹はとても愚かで大きくて太った愚か者です

BACK INTO ENGLISH

My sister is a very stupid, big and fat fool

INTO JAPANESE

私の妹はとても愚かで大きくて太った愚か者です

BACK INTO ENGLISH

My sister is a very stupid, big and fat fool