YOU SAID:
I'll slit your throat with a rusty knife
INTO JAPANESE
錆びたナイフで喉をスリットする
BACK INTO ENGLISH
slit one's throat with a rusty knife
INTO JAPANESE
さびたナイフで喉をスリットする
BACK INTO ENGLISH
slit one's throat with a rusty knife
That didn't even make that much sense in English.