YOU SAID:
your so nicer to be so fat
INTO JAPANESE
あなたはとても太っているほうがいい
BACK INTO ENGLISH
you should be so fat
INTO JAPANESE
あなたはとても太っているはずです
BACK INTO ENGLISH
you must be very fat
INTO JAPANESE
あなたはとても太っているに違いない
BACK INTO ENGLISH
you must be very fat
That didn't even make that much sense in English.