YOU SAID:

I just busted the fattest nut ever on my sister

INTO JAPANESE

私は妹に今までで一番太ったナッツをつぶした

BACK INTO ENGLISH

I broke my sister's fatest nuts ever

INTO JAPANESE

私は妹の最も太ったナッツを壊した

BACK INTO ENGLISH

I broke my sister's fattest nut

INTO JAPANESE

私は妹の太ったナッツを割った

BACK INTO ENGLISH

I broke my sister's fat nuts

INTO JAPANESE

妹の脂肪を壊した

BACK INTO ENGLISH

Broke my sister's fat

INTO JAPANESE

妹の脂肪を壊した

BACK INTO ENGLISH

Broke my sister's fat