YOU SAID:
I'm gonna to make him an offer he can't refuse
INTO JAPANESE
私は彼に断れない申し出をするつもりです
BACK INTO ENGLISH
I'm going to make an offer that I can't refuse to him
INTO JAPANESE
私は彼に断れない申し出をするつもりです
BACK INTO ENGLISH
I'm going to make an offer that I can't refuse to him
That didn't even make that much sense in English.