YOU SAID:
so's yer mum, b-baka!!
INTO JAPANESE
ヤーママ、バカバカ!!
BACK INTO ENGLISH
Yamama, stupid!
INTO JAPANESE
バカ!
BACK INTO ENGLISH
Shut up!
INTO JAPANESE
"黙ってろ!"
BACK INTO ENGLISH
Shut up!
That didn't even make that much sense in English.