YOU SAID:
watashi wa fucku boi desu
INTO JAPANESE
私は fucku boi です。
BACK INTO ENGLISH
I am fucku boi.
INTO JAPANESE
Fucku boi がよ
BACK INTO ENGLISH
Fucku BOI!
INTO JAPANESE
Fucku BOI!
BACK INTO ENGLISH
Fucku BOI!
That didn't even make that much sense in English.