YOU SAID:

you is the big dumb if frick you on the forehead

INTO JAPANESE

おでこをひっかいたら、あなたは大きな愚か者です

BACK INTO ENGLISH

If you scratch your forehead, you are a big fool

INTO JAPANESE

額をひっかくなら、あなたは大馬鹿です

BACK INTO ENGLISH

If you scratch your forehead, you are a big fool