YOU SAID:

I will chainsaw your face off.

INTO JAPANESE

オフ チェーンソーあなたの顔をされます。

BACK INTO ENGLISH

Chain saw off your face.

INTO JAPANESE

顔を洗え

BACK INTO ENGLISH

Wipe that off your face.

INTO JAPANESE

顔を洗え

BACK INTO ENGLISH

Wipe that off your face.