YOU SAID:

It's water off a duck's back

INTO JAPANESE

アヒルの背中から出た水です

BACK INTO ENGLISH

Water from the duck's back

INTO JAPANESE

アヒルの背中から出る水

BACK INTO ENGLISH

water coming out of a duck's back

INTO JAPANESE

アヒルの背中から水が出てくる

BACK INTO ENGLISH

Water comes out of the duck's back

INTO JAPANESE

アヒルの背中から水が出てくる

BACK INTO ENGLISH

Water comes out of the duck's back